Code clean (#9482)

2026-07-31 04:12:04 +03:00 · 2026-06-06 03:20:06 +00:00
parent 4dc9c60b85
commit e6d08c2db1
58 changed files with 169 additions and 217 deletions
--- a/v2rayN/ServiceLib.Tests/CoreConfig/Singbox/CoreConfigSingboxServiceTests.cs
+++ b/v2rayN/ServiceLib.Tests/CoreConfig/Singbox/CoreConfigSingboxServiceTests.cs
@@ -554,7 +554,7 @@ public class CoreConfigSingboxServiceTests

        cfg.dns.servers.Should().Contain(s => s.tag == "remote" && s.type == "udp" && s.server == "8.8.8.8");
        cfg.dns.servers.Should().Contain(s => s.tag == Global.SingboxLocalDNSTag);
-        cfg.dns.rules.Should().Contain(r => r.clash_mode == ERuleMode.Global.ToString());
-        cfg.dns.rules.Should().Contain(r => r.clash_mode == ERuleMode.Direct.ToString());
+        cfg.dns.rules.Should().Contain(r => r.clash_mode == nameof(ERuleMode.Global));
+        cfg.dns.rules.Should().Contain(r => r.clash_mode == nameof(ERuleMode.Direct));
    }
 }
--- a/v2rayN/ServiceLib/Common/CountryExtension.cs
+++ b/v2rayN/ServiceLib/Common/CountryExtension.cs
@@ -87,6 +87,6 @@ public static class CountryExtension
            return null;
        }

-        return CountryEmojiMap.TryGetValue(countryCode, out var emoji) ? emoji : null;
+        return CountryEmojiMap.GetValueOrDefault(countryCode);
    }
 }
--- a/v2rayN/ServiceLib/Common/Extension.cs
+++ b/v2rayN/ServiceLib/Common/Extension.cs
@@ -47,7 +47,7 @@ public static class Extension

    public static string TrimEx(this string? value)
    {
-        return value == null ? string.Empty : value.Trim();
+        return value?.Trim() ?? string.Empty;
    }

    public static string RemovePrefix(this string value, char prefix)
--- a/v2rayN/ServiceLib/Handler/ConfigHandler.cs
+++ b/v2rayN/ServiceLib/Handler/ConfigHandler.cs
@@ -43,10 +43,10 @@ public static class ConfigHandler

        if (config.Inbound == null)
        {
-            config.Inbound = new List<InItem>();
+            config.Inbound = [];
            InItem inItem = new()
            {
-                Protocol = EInboundProtocol.socks.ToString(),
+                Protocol = nameof(EInboundProtocol.socks),
                LocalPort = 10808,
                UdpEnabled = true,
                SniffingEnabled = true,
@@ -59,7 +59,7 @@ public static class ConfigHandler
        {
            if (config.Inbound.Count > 0)
            {
-                config.Inbound.First().Protocol = EInboundProtocol.socks.ToString();
+                config.Inbound.First().Protocol = nameof(EInboundProtocol.socks);
            }
        }

@@ -98,8 +98,8 @@ public static class ConfigHandler
        config.MsgUIItem ??= new();

        config.UiItem ??= new();
-        config.UiItem.MainColumnItem ??= new();
-        config.UiItem.WindowSizeItem ??= new();
+        config.UiItem.MainColumnItem ??= [];
+        config.UiItem.WindowSizeItem ??= [];

        if (config.UiItem.CurrentLanguage.IsNullOrEmpty())
        {
@@ -157,7 +157,7 @@ public static class ConfigHandler
            DownMbps = 100
        };
        config.ClashUIItem ??= new();
-        config.ClashUIItem.ConnectionsColumnItem ??= new();
+        config.ClashUIItem.ConnectionsColumnItem ??= [];
        config.SystemProxyItem ??= new();
        config.WebDavItem ??= new();
        config.CheckUpdateItem ??= new();
@@ -167,7 +167,7 @@ public static class ConfigHandler
            Length = "50-100",
            Interval = "10-20"
        };
-        config.GlobalHotkeys ??= new();
+        config.GlobalHotkeys ??= [];

        if (config.SystemProxyItem.SystemProxyExceptions.IsNullOrEmpty())
        {
@@ -1056,8 +1056,8 @@ public static class ConfigHandler
            return new Tuple<int, int>(0, 0);
        }

-        List<ProfileItem> lstKeep = new();
-        List<ProfileItem> lstRemove = new();
+        List<ProfileItem> lstKeep = [];
+        List<ProfileItem> lstRemove = [];
        if (!config.GuiItem.KeepOlderDedupl)
        {
            lstProfile.Reverse();
@@ -1533,7 +1533,7 @@ public static class ConfigHandler
        }

        var countServers = 0;
-        List<ProfileItem> lstAdd = new();
+        List<ProfileItem> lstAdd = [];
        var arrData = strData.Split(Environment.NewLine.ToCharArray()).Where(t => !t.IsNullOrEmpty());
        if (isSub)
        {
@@ -1629,7 +1629,7 @@ public static class ConfigHandler
        {
            lstProfiles = V2rayFmt.ResolveFullArray(strData, subRemarks);
        }
-        if (lstProfiles != null && lstProfiles.Count > 0)
+        if (lstProfiles is { Count: > 0 })
        {
            var count = 0;
            foreach (var it in lstProfiles)
--- a/v2rayN/ServiceLib/Handler/ConnectionHandler.cs
+++ b/v2rayN/ServiceLib/Handler/ConnectionHandler.cs
@@ -80,14 +80,14 @@ public static class ConnectionHandler
                UseProxy = webProxy != null
            });

-            List<int> oneTime = new();
+            List<int> oneTime = [];
            for (var i = 0; i < 2; i++)
            {
                var timer = Stopwatch.StartNew();
                await client.GetAsync(url, cts.Token).ConfigureAwait(false);
                timer.Stop();
                oneTime.Add((int)timer.Elapsed.TotalMilliseconds);
-                await Task.Delay(100);
+                await Task.Delay(100, cts.Token);
            }
            responseTime = oneTime.Where(x => x > 0).OrderBy(x => x).FirstOrDefault();
        }
--- a/v2rayN/ServiceLib/Handler/Fmt/InnerFmt.cs
+++ b/v2rayN/ServiceLib/Handler/Fmt/InnerFmt.cs
@@ -185,7 +185,7 @@ public class InnerFmt
            return null;
        }
        // Check Enum.IsDefined
-        if (!Enum.IsDefined(typeof(EConfigType), profileItem.ConfigType))
+        if (!Enum.IsDefined(profileItem.ConfigType))
        {
            return null;
        }
--- a/v2rayN/ServiceLib/Handler/Fmt/SocksFmt.cs
+++ b/v2rayN/ServiceLib/Handler/Fmt/SocksFmt.cs
@@ -71,7 +71,7 @@ public class SocksFmt : BaseFmt
            return null;
        }
        var arr21 = arr1.First().Split(':');
-        var indexPort = arr1.Last().LastIndexOf(":");
+        var indexPort = arr1.Last().LastIndexOf(':');
        if (arr21.Length != 2 || indexPort < 0)
        {
            return null;
--- a/v2rayN/ServiceLib/Handler/SubscriptionHandler.cs
+++ b/v2rayN/ServiceLib/Handler/SubscriptionHandler.cs
@@ -133,12 +133,12 @@ public static class SubscriptionHandler

            if (!url.Contains("target="))
            {
-                url += string.Format("&target={0}", item.ConvertTarget);
+                url += $"&target={item.ConvertTarget}";
            }

            if (!url.Contains("config="))
            {
-                url += string.Format("&config={0}", Global.SubConvertConfig.FirstOrDefault());
+                url += $"&config={Global.SubConvertConfig.FirstOrDefault()}";
            }
        }

--- a/v2rayN/ServiceLib/Manager/AppManager.cs
+++ b/v2rayN/ServiceLib/Manager/AppManager.cs
@@ -268,7 +268,7 @@ public sealed class AppManager
            .ToListAsync();
        var itemMap = items.ToDictionary(it => it.IndexId);

-        return idList.Select(id => itemMap.GetValueOrDefault(id))
+        return idList.Select(itemMap.GetValueOrDefault)
            .Where(item => item != null)
            .ToList();
    }
--- a/v2rayN/ServiceLib/Manager/ClashApiManager.cs
+++ b/v2rayN/ServiceLib/Manager/ClashApiManager.cs
@@ -45,19 +45,14 @@ public sealed class ClashApiManager
                {
                    await GetClashProxiesAsync();
                }
-                lstProxy = new List<ClashProxyModel>();
-                foreach (var kv in _proxies ?? [])
-                {
-                    if (Global.notAllowTestType.Contains(kv.Value.type?.ToLower()))
-                    {
-                        continue;
-                    }
-                    lstProxy.Add(new ClashProxyModel()
-                    {
-                        Name = kv.Value.name,
-                        Type = kv.Value.type?.ToLower(),
-                    });
-                }
+                lstProxy = [];
+                lstProxy.AddRange(from kv in _proxies ?? []
+                                  where !Global.notAllowTestType.Contains(kv.Value.type?.ToLower())
+                                  select new ClashProxyModel()
+                                  {
+                                      Name = kv.Value.name,
+                                      Type = kv.Value.type?.ToLower(),
+                                  });
            }

            if (lstProxy is not { Count: > 0 })
--- a/v2rayN/ServiceLib/Manager/GroupProfileManager.cs
+++ b/v2rayN/ServiceLib/Manager/GroupProfileManager.cs
@@ -9,7 +9,7 @@ public class GroupProfileManager

    public static async Task<bool> HasCycle(string? indexId, ProtocolExtraItem? extraInfo)
    {
-        return await HasCycle(indexId, extraInfo, new HashSet<string>(), new HashSet<string>());
+        return await HasCycle(indexId, extraInfo, [], []);
    }

    private static async Task<bool> HasCycle(string? indexId, ProtocolExtraItem? extraInfo, HashSet<string> visited, HashSet<string> stack)
@@ -55,7 +55,7 @@ public class GroupProfileManager
            var childItems = await AppManager.Instance.GetProfileItemsByIndexIds(childIds);
            foreach (var childItem in childItems)
            {
-                if (await HasCycle(childItem.IndexId, childItem?.GetProtocolExtra(), visited, stack))
+                if (await HasCycle(childItem.IndexId, childItem.GetProtocolExtra(), visited, stack))
                {
                    return true;
                }
@@ -71,7 +71,7 @@ public class GroupProfileManager

    public static async Task<(List<ProfileItem> Items, ProtocolExtraItem? Extra)> GetChildProfileItems(ProfileItem profileItem)
    {
-        var protocolExtra = profileItem?.GetProtocolExtra();
+        var protocolExtra = profileItem.GetProtocolExtra();
        return (await GetChildProfileItemsByProtocolExtra(protocolExtra), protocolExtra);
    }

--- a/v2rayN/ServiceLib/Manager/ProfileExManager.cs
+++ b/v2rayN/ServiceLib/Manager/ProfileExManager.cs
@@ -111,7 +111,7 @@ public class ProfileExManager
    public async Task ClearAll()
    {
        await SQLiteHelper.Instance.ExecuteAsync($"delete from ProfileExItem ");
-        _lstProfileEx = new();
+        _lstProfileEx = [];
    }

    public async Task SaveTo()
@@ -182,6 +182,6 @@ public class ProfileExManager
        {
            return 0;
        }
-        return _lstProfileEx.Max(t => t == null ? 0 : t.Sort);
+        return _lstProfileEx.Max(t => t?.Sort ?? 0);
    }
 }
--- a/v2rayN/ServiceLib/Manager/StatisticsManager.cs
+++ b/v2rayN/ServiceLib/Manager/StatisticsManager.cs
@@ -45,7 +45,7 @@ public class StatisticsManager
    {
        await SQLiteHelper.Instance.ExecuteAsync($"delete from ServerStatItem ");
        _serverStatItem = null;
-        _lstServerStat = new();
+        _lstServerStat = [];
    }

    public async Task SaveTo()
--- a/v2rayN/ServiceLib/Models/CoreConfigs/V2rayConfig.cs
+++ b/v2rayN/ServiceLib/Models/CoreConfigs/V2rayConfig.cs
@@ -136,7 +136,7 @@ public class Outboundsettings4Ray

    public Response4Ray? response { get; set; }

-    public string domainStrategy { get; set; }
+    public string? domainStrategy { get; set; }

    public int? userLevel { get; set; }

--- a/v2rayN/ServiceLib/Models/Dto/RetResult.cs
+++ b/v2rayN/ServiceLib/Models/Dto/RetResult.cs
@@ -1,26 +1,16 @@
 namespace ServiceLib.Models.Dto;

-public class RetResult
+public class RetResult(bool success, string? msg, object? data)
 {
-    public bool Success { get; set; }
-    public string? Msg { get; set; }
-    public object? Data { get; set; }
-
-    public RetResult(bool success = false)
+    public RetResult(bool success = false) : this(success, null, null)
    {
-        Success = success;
    }

-    public RetResult(bool success, string? msg)
+    public RetResult(bool success, string? msg) : this(success, msg, null)
    {
-        Success = success;
-        Msg = msg;
    }

-    public RetResult(bool success, string? msg, object? data)
-    {
-        Success = success;
-        Msg = msg;
-        Data = data;
-    }
+    public bool Success { get; set; } = success;
+    public string? Msg { get; set; } = msg;
+    public object? Data { get; set; } = data;
 }
--- a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigClashService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigClashService.cs
@@ -3,16 +3,10 @@ namespace ServiceLib.Services.CoreConfig;
 /// <summary>
 /// Core configuration file processing class
 /// </summary>
-public class CoreConfigClashService
+public class CoreConfigClashService(Config config)
 {
-    private Config _config;
    private static readonly string _tag = "CoreConfigClashService";

-    public CoreConfigClashService(Config config)
-    {
-        _config = config;
-    }
-
    public async Task<RetResult> GenerateClientCustomConfig(ProfileItem node, string? fileName)
    {
        var ret = new RetResult();
@@ -56,7 +50,7 @@ public class CoreConfigClashService
            var tagYamlStr1 = "!<str>";
            var tagYamlStr2 = "__strn__";
            var tagYamlStr3 = "!!str";
-            var txtFile = File.ReadAllText(addressFileName);
+            var txtFile = await File.ReadAllTextAsync(addressFileName);
            txtFile = txtFile.Replace(tagYamlStr1, tagYamlStr2);

            //YAML anchors
@@ -75,13 +69,13 @@ public class CoreConfigClashService
            //mixed-port
            fileContent["mixed-port"] = AppManager.Instance.GetLocalPort(EInboundProtocol.socks);
            //log-level
-            fileContent["log-level"] = GetLogLevel(_config.CoreBasicItem.Loglevel);
+            fileContent["log-level"] = GetLogLevel(config.CoreBasicItem.Loglevel);

            //external-controller
            fileContent["external-controller"] = $"{Global.Loopback}:{AppManager.Instance.StatePort2}";
            fileContent.Remove("secret");
            //allow-lan
-            if (_config.Inbound.First().AllowLANConn)
+            if (config.Inbound.First().AllowLANConn)
            {
                fileContent["allow-lan"] = "true";
                fileContent["bind-address"] = "*";
@@ -92,23 +86,23 @@ public class CoreConfigClashService
            }

            //ipv6
-            fileContent["ipv6"] = _config.ClashUIItem.EnableIPv6;
+            fileContent["ipv6"] = config.ClashUIItem.EnableIPv6;

            //mode
            if (!fileContent.ContainsKey("mode"))
            {
-                fileContent["mode"] = ERuleMode.Rule.ToString().ToLower();
+                fileContent["mode"] = nameof(ERuleMode.Rule).ToLower();
            }
            else
            {
-                if (_config.ClashUIItem.RuleMode != ERuleMode.Unchanged)
+                if (config.ClashUIItem.RuleMode != ERuleMode.Unchanged)
                {
-                    fileContent["mode"] = _config.ClashUIItem.RuleMode.ToString().ToLower();
+                    fileContent["mode"] = config.ClashUIItem.RuleMode.ToString().ToLower();
                }
            }

            //enable tun mode
-            if (_config.TunModeItem.EnableTun)
+            if (config.TunModeItem.EnableTun)
            {
                var tun = EmbedUtils.GetEmbedText(Global.ClashTunYaml);
                if (tun.IsNotEmpty())
@@ -156,7 +150,7 @@ public class CoreConfigClashService

    private async Task MixinContent(Dictionary<string, object> fileContent, ProfileItem node)
    {
-        if (!_config.ClashUIItem.EnableMixinContent)
+        if (!config.ClashUIItem.EnableMixinContent)
        {
            return;
        }
@@ -177,7 +171,7 @@ public class CoreConfigClashService
        }
        foreach (var item in mixinContent)
        {
-            if (!_config.TunModeItem.EnableTun && item.Key == "tun")
+            if (!config.TunModeItem.EnableTun && item.Key == "tun")
            {
                continue;
            }
@@ -220,9 +214,8 @@ public class CoreConfigClashService
            return;
        }

-        if (!blRemoved && !fileContent.ContainsKey(key))
+        if (!blRemoved && fileContent.TryAdd(key, value))
        {
-            fileContent.Add(key, value);
            return;
        }
        var lstOri = (List<object>)fileContent[key];
@@ -244,7 +237,7 @@ public class CoreConfigClashService
        }
        else
        {
-            lstValue.ForEach(item => lstOri.Add(item));
+            lstValue.ForEach(lstOri.Add);
        }
    }

--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/CoreConfigSingboxService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/CoreConfigSingboxService.cs
@@ -153,7 +153,7 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
                {
                    listen = Global.Loopback,
                    listen_port = port,
-                    type = EInboundProtocol.mixed.ToString(),
+                    type = nameof(EInboundProtocol.mixed),
                };
                inbound.tag = inbound.type + inbound.listen_port.ToString();
                _coreConfig.inbounds.Add(inbound);
@@ -229,7 +229,7 @@ public partial class CoreConfigSingboxService(CoreConfigContext context)
                tag = $"{EInboundProtocol.mixed}{port}",
                listen = Global.Loopback,
                listen_port = port,
-                type = EInboundProtocol.mixed.ToString(),
+                type = nameof(EInboundProtocol.mixed),
            });
            ApplyOutboundBindInterface();
            ApplyOutboundSendThrough();
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxConfigTemplateService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxConfigTemplateService.cs
@@ -23,7 +23,7 @@ public partial class CoreConfigSingboxService
        }

        // Process outbounds
-        var customOutboundsNode = fullConfigTemplateNode["outbounds"] is JsonArray outbounds ? outbounds : [];
+        var customOutboundsNode = fullConfigTemplateNode["outbounds"] as JsonArray ?? [];
        foreach (var outbound in _coreConfig.outbounds)
        {
            if (outbound.type.ToLower() is "direct" or "block")
@@ -42,9 +42,9 @@ public partial class CoreConfigSingboxService
        fullConfigTemplateNode["outbounds"] = customOutboundsNode;

        // Process endpoints
-        if (_coreConfig.endpoints != null && _coreConfig.endpoints.Count > 0)
+        if (_coreConfig.endpoints is { Count: > 0 })
        {
-            var customEndpointsNode = fullConfigTemplateNode["endpoints"] is JsonArray endpoints ? endpoints : [];
+            var customEndpointsNode = fullConfigTemplateNode["endpoints"] as JsonArray ?? [];
            foreach (var endpoint in _coreConfig.endpoints)
            {
                if (endpoint.detour.IsNullOrEmpty() && !fullConfigTemplate.ProxyDetour.IsNullOrEmpty())
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxDnsService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxDnsService.cs
@@ -26,7 +26,7 @@ public partial class CoreConfigSingboxService
            {
                var rules = JsonUtils.Deserialize<List<RulesItem>>(routing.RuleSet) ?? [];

-                if (rules?.LastOrDefault() is { } lastRule && lastRule.OutboundTag == Global.DirectTag)
+                if (rules?.LastOrDefault() is { OutboundTag: Global.DirectTag } lastRule)
                {
                    var noDomain = lastRule.Domain == null || lastRule.Domain.Count == 0;
                    var noProcess = lastRule.Process == null || lastRule.Process.Count == 0;
@@ -82,7 +82,7 @@ public partial class CoreConfigSingboxService
        if (simpleDnsItem.UseSystemHosts == true)
        {
            var systemHosts = Utils.GetSystemHosts();
-            if (systemHosts != null && systemHosts.Count > 0)
+            if (systemHosts is { Count: > 0 })
            {
                foreach (var host in systemHosts)
                {
@@ -182,13 +182,13 @@ public partial class CoreConfigSingboxService
            {
                server = Global.SingboxRemoteDNSTag,
                strategy = Utils.DomainStrategy4Sbox(simpleDnsItem.Strategy4Proxy),
-                clash_mode = ERuleMode.Global.ToString()
+                clash_mode = nameof(ERuleMode.Global)
            },
            new Rule4Sbox
            {
                server = Global.SingboxDirectDNSTag,
                strategy = Utils.DomainStrategy4Sbox(simpleDnsItem.Strategy4Freedom),
-                clash_mode = ERuleMode.Direct.ToString()
+                clash_mode = nameof(ERuleMode.Direct)
            }
        });

@@ -454,12 +454,12 @@ public partial class CoreConfigSingboxService
        dns4Sbox.rules.Insert(0, new()
        {
            server = tag,
-            clash_mode = ERuleMode.Direct.ToString()
+            clash_mode = nameof(ERuleMode.Direct)
        });
        dns4Sbox.rules.Insert(0, new()
        {
            server = dns4Sbox.servers.Where(t => t.detour == Global.ProxyTag).Select(t => t.tag).FirstOrDefault() ?? "remote",
-            clash_mode = ERuleMode.Global.ToString()
+            clash_mode = nameof(ERuleMode.Global)
        });

        var finalDnsAddress = string.IsNullOrEmpty(dnsItem?.DomainDNSAddress) ? Global.DomainPureIPDNSAddress.FirstOrDefault() : dnsItem?.DomainDNSAddress;
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxInboundService.cs
@@ -15,8 +15,8 @@ public partial class CoreConfigSingboxService
            {
                var inbound = new Inbound4Sbox()
                {
-                    type = EInboundProtocol.mixed.ToString(),
-                    tag = EInboundProtocol.socks.ToString(),
+                    type = nameof(EInboundProtocol.mixed),
+                    tag = nameof(EInboundProtocol.socks),
                    listen = Global.Loopback,
                };
                _coreConfig.inbounds.Add(inbound);
@@ -87,7 +87,7 @@ public partial class CoreConfigSingboxService
        var inbound = JsonUtils.DeepCopy(inItem);
        inbound.tag = protocol.ToString();
        inbound.listen_port = inItem.listen_port + (int)protocol;
-        inbound.type = EInboundProtocol.mixed.ToString();
+        inbound.type = nameof(EInboundProtocol.mixed);
        return inbound;
    }
 }
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs
@@ -730,8 +730,8 @@ public partial class CoreConfigSingboxService
            {
                return;
            }
-            var outbounds = servers.Where(s => s is Outbound4Sbox).Cast<Outbound4Sbox>().ToList();
-            var endpoints = servers.Where(s => s is Endpoints4Sbox).Cast<Endpoints4Sbox>().ToList();
+            var outbounds = servers.OfType<Outbound4Sbox>().ToList();
+            var endpoints = servers.OfType<Endpoints4Sbox>().ToList();
            singboxConfig.endpoints ??= [];
            if (prepend)
            {
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRoutingService.cs
@@ -193,12 +193,12 @@ public partial class CoreConfigSingboxService
            _coreConfig.route.rules.Add(new()
            {
                outbound = Global.DirectTag,
-                clash_mode = ERuleMode.Direct.ToString()
+                clash_mode = nameof(ERuleMode.Direct)
            });
            _coreConfig.route.rules.Add(new()
            {
                outbound = Global.ProxyTag,
-                clash_mode = ERuleMode.Global.ToString()
+                clash_mode = nameof(ERuleMode.Global)
            });

            var domainStrategy = _config.RoutingBasicItem.DomainStrategy4Singbox.NullIfEmpty();
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRulesetService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxRulesetService.cs
@@ -18,15 +18,15 @@ public partial class CoreConfigSingboxService
        //convert route geosite & geoip to ruleset
        foreach (var rule in _coreConfig.route.rules.Where(t => t.geosite?.Count > 0).ToList() ?? [])
        {
-            rule.rule_set ??= new List<string>();
-            rule.rule_set.AddRange(rule?.geosite?.Select(t => $"{geosite}-{t}").ToList());
+            rule.rule_set ??= [];
+            rule.rule_set.AddRange(rule?.geosite?.Select(t => $"{geosite}-{t}").ToList() ?? []);
            rule.geosite = null;
            AddRuleSets(ruleSets, rule.rule_set);
        }
        foreach (var rule in _coreConfig.route.rules.Where(t => t.geoip?.Count > 0).ToList() ?? [])
        {
-            rule.rule_set ??= new List<string>();
-            rule.rule_set.AddRange(rule?.geoip?.Select(t => $"{geoip}-{t}").ToList());
+            rule.rule_set ??= [];
+            rule.rule_set.AddRange(rule?.geoip?.Select(t => $"{geoip}-{t}").ToList() ?? []);
            rule.geoip = null;
            AddRuleSets(ruleSets, rule.rule_set);
        }
@@ -34,14 +34,14 @@ public partial class CoreConfigSingboxService
        //convert dns geosite & geoip to ruleset
        foreach (var rule in _coreConfig.dns?.rules.Where(t => t.geosite?.Count > 0).ToList() ?? [])
        {
-            rule.rule_set ??= new List<string>();
-            rule.rule_set.AddRange(rule?.geosite?.Select(t => $"{geosite}-{t}").ToList());
+            rule.rule_set ??= [];
+            rule.rule_set.AddRange(rule?.geosite?.Select(t => $"{geosite}-{t}").ToList() ?? []);
            rule.geosite = null;
        }
        foreach (var rule in _coreConfig.dns?.rules.Where(t => t.geoip?.Count > 0).ToList() ?? [])
        {
-            rule.rule_set ??= new List<string>();
-            rule.rule_set.AddRange(rule?.geoip?.Select(t => $"{geoip}-{t}").ToList());
+            rule.rule_set ??= [];
+            rule.rule_set.AddRange(rule?.geoip?.Select(t => $"{geoip}-{t}").ToList() ?? []);
            rule.geoip = null;
        }
        foreach (var dnsRule in _coreConfig.dns?.rules.Where(t => t.rule_set?.Count > 0).ToList() ?? [])
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/CoreConfigV2rayService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/CoreConfigV2rayService.cs
@@ -165,7 +165,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
                {
                    listen = Global.Loopback,
                    port = port,
-                    protocol = EInboundProtocol.mixed.ToString(),
+                    protocol = nameof(EInboundProtocol.mixed),
                    settings = new Inboundsettings4Ray()
                    {
                        udp = true,
@@ -270,7 +270,7 @@ public partial class CoreConfigV2rayService(CoreConfigContext context)
                tag = $"{EInboundProtocol.socks}{port}",
                listen = Global.Loopback,
                port = port,
-                protocol = EInboundProtocol.mixed.ToString(),
+                protocol = nameof(EInboundProtocol.mixed),
                settings = new Inboundsettings4Ray()
                {
                    udp = true,
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayBalancerService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayBalancerService.cs
@@ -56,7 +56,7 @@ public partial class CoreConfigV2rayService
            }
            else
            {
-                _coreConfig.burstObservatory.subjectSelector ??= new();
+                _coreConfig.burstObservatory.subjectSelector ??= [];
                _coreConfig.burstObservatory.subjectSelector.Add(baseTagName);
            }
        }
@@ -75,7 +75,7 @@ public partial class CoreConfigV2rayService
            }
            else
            {
-                _coreConfig.observatory.subjectSelector ??= new();
+                _coreConfig.observatory.subjectSelector ??= [];
                _coreConfig.observatory.subjectSelector.Add(baseTagName);
            }
        }
@@ -106,7 +106,7 @@ public partial class CoreConfigV2rayService
            tag = balancerTag,
            fallbackTag = multipleLoad == EMultipleLoad.Fallback ? Global.DirectTag : null,
        };
-        _coreConfig.routing.balancers ??= new();
+        _coreConfig.routing.balancers ??= [];
        _coreConfig.routing.balancers.Add(balancer);
    }
 }
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayConfigTemplateService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayConfigTemplateService.cs
@@ -46,10 +46,7 @@ public partial class CoreConfigV2rayService
            }

            // Ensure routing node exists
-            if (fullConfigTemplateNode["routing"] == null)
-            {
-                fullConfigTemplateNode["routing"] = new JsonObject();
-            }
+            fullConfigTemplateNode["routing"] ??= new JsonObject();

            // Handle balancers - append instead of override
            if (fullConfigTemplateNode["routing"]["balancers"] is JsonArray customBalancersNode)
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayDnsService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayDnsService.cs
@@ -34,7 +34,7 @@ public partial class CoreConfigV2rayService
                return;
            }
            var simpleDnsItem = context.SimpleDnsItem;
-            var dnsItem = _coreConfig.dns is Dns4Ray dns4Ray ? dns4Ray : new Dns4Ray();
+            var dnsItem = _coreConfig.dns as Dns4Ray ?? new Dns4Ray();

            var strategy4Freedom = simpleDnsItem?.Strategy4Freedom ?? Global.AsIs;
            //Outbound Freedom domainStrategy
@@ -246,7 +246,7 @@ public partial class CoreConfigV2rayService

        var useDirectDns = false;

-        if (rules?.LastOrDefault() is { } lastRule && lastRule.OutboundTag == Global.DirectTag)
+        if (rules?.LastOrDefault() is { OutboundTag: Global.DirectTag } lastRule)
        {
            var noDomain = lastRule.Domain == null || lastRule.Domain.Count == 0;
            var noProcess = lastRule.Process == null || lastRule.Process.Count == 0;
@@ -384,9 +384,11 @@ public partial class CoreConfigV2rayService
                var outbound = _coreConfig.outbounds.FirstOrDefault(t => t is { protocol: "freedom", tag: Global.DirectTag });
                if (outbound != null)
                {
-                    outbound.settings = new();
-                    outbound.settings.domainStrategy = domainStrategy4Freedom;
-                    outbound.settings.userLevel = 0;
+                    outbound.settings = new()
+                    {
+                        domainStrategy = domainStrategy4Freedom,
+                        userLevel = 0,
+                    };
                }
            }

--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayInboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayInboundService.cs
@@ -145,7 +145,7 @@ public partial class CoreConfigV2rayService
        }
        inbound.tag = protocol.ToString();
        inbound.port = inItem.LocalPort + (int)protocol;
-        inbound.protocol = EInboundProtocol.mixed.ToString();
+        inbound.protocol = nameof(EInboundProtocol.mixed);
        inbound.settings.udp = inItem.UdpEnabled;
        inbound.sniffing.enabled = inItem.SniffingEnabled;
        inbound.sniffing.destOverride = inItem.DestOverride;
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs
@@ -243,9 +243,9 @@ public partial class CoreConfigV2rayService
                            version = 2,
                            address = _node.Address,
                            port = _node.Port,
+                            vnext = null,
+                            servers = null,
                        };
-                        outbound.settings.vnext = null;
-                        outbound.settings.servers = null;
                        break;
                    }
                case EConfigType.WireGuard:
@@ -450,14 +450,13 @@ public partial class CoreConfigV2rayService
                    KcpSettings4Ray kcpSettings = new()
                    {
                        mtu = kcpMtu,
-                        tti = _config.KcpItem.Tti
+                        tti = _config.KcpItem.Tti,
+                        uplinkCapacity = _config.KcpItem.UplinkCapacity,
+                        downlinkCapacity = _config.KcpItem.DownlinkCapacity,
+                        cwndMultiplier = _config.KcpItem.CwndMultiplier,
+                        maxSendingWindow = _config.KcpItem.MaxSendingWindow,
                    };

-                    kcpSettings.uplinkCapacity = _config.KcpItem.UplinkCapacity;
-                    kcpSettings.downlinkCapacity = _config.KcpItem.DownlinkCapacity;
-
-                    kcpSettings.cwndMultiplier = _config.KcpItem.CwndMultiplier;
-                    kcpSettings.maxSendingWindow = _config.KcpItem.MaxSendingWindow;
                    var kcpFinalmask = new Finalmask4Ray();
                    if (Global.KcpHeaderMaskMap.TryGetValue(headerType, out var header))
                    {
@@ -531,7 +530,7 @@ public partial class CoreConfigV2rayService
                    break;
                //xhttp
                case nameof(ETransport.xhttp):
-                    streamSettings.network = ETransport.xhttp.ToString();
+                    streamSettings.network = nameof(ETransport.xhttp);
                    XhttpSettings4Ray xhttpSettings = new();

                    if (path.IsNotEmpty())
--- a/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayStatisticService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayStatisticService.cs
@@ -6,7 +6,7 @@ public partial class CoreConfigV2rayService
    {
        if (_config.GuiItem.EnableStatistics || _config.GuiItem.DisplayRealTimeSpeed)
        {
-            var tag = EInboundProtocol.api.ToString();
+            const string tag = nameof(EInboundProtocol.api);
            Metrics4Ray apiObj = new();
            Policy4Ray policyObj = new();
            SystemPolicy4Ray policySystemSetting = new();
--- a/v2rayN/ServiceLib/Services/SpeedtestService.cs
+++ b/v2rayN/ServiceLib/Services/SpeedtestService.cs
@@ -7,7 +7,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
    private static readonly string _tag = "SpeedtestService";
    private readonly Config? _config = config;
    private readonly Func<SpeedTestResult, Task>? _updateFunc = updateFunc;
-    private static readonly ConcurrentBag<string> _lstExitLoop = new();
+    private static readonly ConcurrentBag<string> _lstExitLoop = [];
    private readonly int _speedTestPageSize = config.SpeedTestItem.SpeedTestPageSize ?? Global.SpeedTestPageSize;
    private readonly TimeSpan _delayInterval = TimeSpan.FromSeconds(config.SpeedTestItem.SpeedTestDelayInterval ?? 1);

@@ -33,7 +33,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF

    private static bool ShouldStopTest(string exitLoopKey)
    {
-        return !_lstExitLoop.Any(p => p == exitLoopKey);
+        return _lstExitLoop.All(p => p != exitLoopKey);
    }

    private async Task RunAsync(ESpeedActionType actionType, List<ProfileItem> selecteds)
@@ -173,7 +173,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
        }
        var lstTest = GetTestBatchItem(lstSelected, pageSize);

-        List<ServerTestItem> lstFailed = new();
+        List<ServerTestItem> lstFailed = [];
        foreach (var lst in lstTest)
        {
            var ret = await RunRealPingAsync(lst, exitLoopKey);
@@ -219,7 +219,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
            }
            await Task.Delay(1000);

-            List<Task> tasks = new();
+            List<Task> tasks = [];
            foreach (var it in selecteds)
            {
                if (!it.AllowTest)
@@ -262,7 +262,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
        }
        var lstTest = GetTestBatchItem(lstSelected, pageSize);

-        List<ServerTestItem> lstFailed = new();
+        List<ServerTestItem> lstFailed = [];
        foreach (var lst in lstTest)
        {
            var ret = await RunUdpTestAsync(lst, exitLoopKey);
@@ -300,7 +300,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
            }
            await Task.Delay(1000);

-            List<Task> tasks = new();
+            List<Task> tasks = [];
            foreach (var it in selecteds)
            {
                if (!it.AllowTest)
@@ -338,7 +338,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF
    {
        using var concurrencySemaphore = new SemaphoreSlim(concurrencyCount);
        var downloadHandle = new DownloadService();
-        List<Task> tasks = new();
+        List<Task> tasks = [];
        foreach (var it in selecteds)
        {
            if (ShouldStopTest(exitLoopKey))
@@ -489,7 +489,7 @@ public class SpeedtestService(Config config, Func<SpeedTestResult, Task> updateF

    private List<List<ServerTestItem>> GetTestBatchItem(List<ServerTestItem> lstSelected, int pageSize)
    {
-        List<List<ServerTestItem>> lstTest = new();
+        List<List<ServerTestItem>> lstTest = [];
        var lst1 = lstSelected.Where(t => t.CoreType == ECoreType.Xray).ToList();
        var lst2 = lstSelected.Where(t => t.CoreType == ECoreType.sing_box).ToList();

--- a/v2rayN/ServiceLib/Services/WindowsJobService.cs
+++ b/v2rayN/ServiceLib/Services/WindowsJobService.cs
@@ -31,8 +31,7 @@ public sealed class WindowsJobService : IDisposable
            if (!SetInformationJobObject(handle, JobObjectInfoType.ExtendedLimitInformation, extendedInfoPtr,
                    (uint)length))
            {
-                throw new Exception(string.Format("Unable to set information.  Error: {0}",
-                    Marshal.GetLastWin32Error()));
+                throw new Exception($"Unable to set information.  Error: {Marshal.GetLastWin32Error()}");
            }
        }
        finally
--- a/v2rayN/ServiceLib/ViewModels/AddGroupServerViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/AddGroupServerViewModel.cs
@@ -216,7 +216,7 @@ public class AddGroupServerViewModel : MyReactiveObject
            NoticeManager.Instance.Enqueue(ResUI.PleaseAddAtLeastOneServer);
            return;
        }
-        SelectedSource.CoreType = CoreType.IsNullOrEmpty() ? ECoreType.Xray : (ECoreType)Enum.Parse(typeof(ECoreType), CoreType);
+        SelectedSource.CoreType = CoreType.IsNullOrEmpty() ? ECoreType.Xray : Enum.Parse<ECoreType>(CoreType);
        if (SelectedSource.CoreType is not (ECoreType.Xray or ECoreType.sing_box) ||
            SelectedSource.ConfigType is not (EConfigType.ProxyChain or EConfigType.PolicyGroup))
        {
--- a/v2rayN/ServiceLib/ViewModels/AddServer2ViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/AddServer2ViewModel.cs
@@ -50,7 +50,7 @@ public class AddServer2ViewModel : MyReactiveObject
            NoticeManager.Instance.Enqueue(ResUI.FillServerAddressCustom);
            return;
        }
-        SelectedSource.CoreType = CoreType.IsNullOrEmpty() ? null : (ECoreType)Enum.Parse(typeof(ECoreType), CoreType);
+        SelectedSource.CoreType = CoreType.IsNullOrEmpty() ? null : Enum.Parse<ECoreType>(CoreType);

        if (await ConfigHandler.EditCustomServer(_config, SelectedSource) == 0)
        {
--- a/v2rayN/ServiceLib/ViewModels/ClashConnectionsViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/ClashConnectionsViewModel.cs
@@ -69,7 +69,7 @@ public class ClashConnectionsViewModel : MyReactiveObject

        var dtNow = DateTime.Now;
        var lstModel = new List<ClashConnectionModel>();
-        foreach (var item in connections ?? new())
+        foreach (var item in connections ?? [])
        {
            var host = $"{(item.metadata.host.IsNullOrEmpty() ? item.metadata.destinationIP : item.metadata.host)}:{item.metadata.destinationPort}";
            if (HostFilter.IsNotEmpty() && !host.Contains(HostFilter))
@@ -85,7 +85,7 @@ public class ClashConnectionsViewModel : MyReactiveObject
                Host = host,
                Time = (dtNow - item.start).TotalSeconds < 0 ? 1 : (dtNow - item.start).TotalSeconds,
                Elapsed = (dtNow - item.start).ToString(@"hh\:mm\:ss"),
-                Chain = $"{item.rule} , {string.Join("->", item.chains ?? new())}"
+                Chain = $"{item.rule} , {string.Join("->", item.chains ?? [])}"
            };

            lstModel.Add(model);
--- a/v2rayN/ServiceLib/ViewModels/ClashProxiesViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/ClashProxiesViewModel.cs
@@ -67,7 +67,7 @@ public class ClashProxiesViewModel : MyReactiveObject
        this.WhenAnyValue(
           x => x.SelectedGroup,
           y => y != null && y.Name.IsNotEmpty())
-               .Subscribe(c => RefreshProxyDetails(c));
+               .Subscribe(RefreshProxyDetails);

        this.WhenAnyValue(
           x => x.RuleModeSelected,
@@ -77,7 +77,7 @@ public class ClashProxiesViewModel : MyReactiveObject
        this.WhenAnyValue(
           x => x.SortingSelected,
           y => y >= 0)
-              .Subscribe(c => DoSortingSelected(c));
+              .Subscribe(DoSortingSelected);

        this.WhenAnyValue(
        x => x.AutoRefresh,
@@ -188,15 +188,14 @@ public class ClashProxiesViewModel : MyReactiveObject
        ProxyGroups.Clear();

        var proxyGroups = ClashApiManager.Instance.GetClashProxyGroups();
-        if (proxyGroups != null && proxyGroups.Count > 0)
+        if (proxyGroups is { Count: > 0 })
        {
            foreach (var it in proxyGroups)
            {
-                if (it.name.IsNullOrEmpty() || !_proxies.ContainsKey(it.name))
+                if (it.name.IsNullOrEmpty() || !_proxies.TryGetValue(it.name, out var item))
                {
                    continue;
                }
-                var item = _proxies[it.name];
                if (!Global.allowSelectType.Contains(item.type.ToLower()))
                {
                    continue;
@@ -230,7 +229,7 @@ public class ClashProxiesViewModel : MyReactiveObject
            });
        }

-        if (ProxyGroups != null && ProxyGroups.Count > 0)
+        if (ProxyGroups is { Count: > 0 })
        {
            if (selectedName != null && ProxyGroups.Any(t => t.Name == selectedName))
            {
--- a/v2rayN/ServiceLib/ViewModels/DNSSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/DNSSettingViewModel.cs
@@ -56,7 +56,7 @@ public class DNSSettingViewModel : MyReactiveObject
        });

        this.WhenAnyValue(x => x.RayCustomDNSEnableCompatible, x => x.SBCustomDNSEnableCompatible)
-            .Select(x => !(x.Item1 && x.Item2))
+            .Select(x => x is not { Item1: true, Item2: true })
            .ToPropertyEx(this, x => x.IsSimpleDNSEnabled);

        _ = Init();
--- a/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/OptionSettingViewModel.cs
@@ -236,12 +236,9 @@ public class OptionSettingViewModel : MyReactiveObject

    private async Task InitCoreType()
    {
-        if (_config.CoreTypeItem == null)
-        {
-            _config.CoreTypeItem = new List<CoreTypeItem>();
-        }
+        _config.CoreTypeItem ??= [];

-        foreach (EConfigType it in Enum.GetValues(typeof(EConfigType)))
+        foreach (var it in Enum.GetValues<EConfigType>())
        {
            if (_config.CoreTypeItem.FindIndex(t => t.ConfigType == it) >= 0)
            {
@@ -458,7 +455,7 @@ public class OptionSettingViewModel : MyReactiveObject
                default:
                    continue;
            }
-            item.CoreType = (ECoreType)Enum.Parse(typeof(ECoreType), type);
+            item.CoreType = Enum.Parse<ECoreType>(type);
        }
        await Task.CompletedTask;
    }
--- a/v2rayN/ServiceLib/ViewModels/ProfilesSelectViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/ProfilesSelectViewModel.cs
@@ -5,13 +5,10 @@ public class ProfilesSelectViewModel : MyReactiveObject
    #region private prop

    private string _serverFilter = string.Empty;
-    private Dictionary<string, bool> _dicHeaderSort = new();
+    private readonly Dictionary<string, bool> _dicHeaderSort = new();
    private string _subIndexId = string.Empty;

    // ConfigType filter state: default include-mode with all types selected
-    private List<EConfigType> _filterConfigTypes = new();
-
-    private bool _filterExclude = false;

    #endregion private prop

@@ -33,18 +30,11 @@ public class ProfilesSelectViewModel : MyReactiveObject
    public string ServerFilter { get; set; }

    // Include/Exclude filter for ConfigType
-    public List<EConfigType> FilterConfigTypes
-    {
-        get => _filterConfigTypes;
-        set => this.RaiseAndSetIfChanged(ref _filterConfigTypes, value);
-    }
+    [Reactive]
+    public List<EConfigType> FilterConfigTypes { get; set; }

    [Reactive]
-    public bool FilterExclude
-    {
-        get => _filterExclude;
-        set => this.RaiseAndSetIfChanged(ref _filterExclude, value);
-    }
+    public bool FilterExclude { get; set; }

    #endregion ObservableCollection

@@ -91,11 +81,11 @@ public class ProfilesSelectViewModel : MyReactiveObject
        try
        {
            FilterExclude = false;
-            FilterConfigTypes = Enum.GetValues(typeof(EConfigType)).Cast<EConfigType>().ToList();
+            FilterConfigTypes = Enum.GetValues<EConfigType>().ToList();
        }
        catch
        {
-            FilterConfigTypes = new();
+            FilterConfigTypes = [];
        }

        await RefreshSubscriptions();
@@ -165,14 +155,7 @@ public class ProfilesSelectViewModel : MyReactiveObject
        if (lstModel.Count > 0)
        {
            var selected = lstModel.FirstOrDefault(t => t.IndexId == _config.IndexId);
-            if (selected != null)
-            {
-                SelectedProfile = selected;
-            }
-            else
-            {
-                SelectedProfile = lstModel.First();
-            }
+            SelectedProfile = selected ?? lstModel.First();
        }

        await _updateView?.Invoke(EViewAction.DispatcherRefreshServersBiz, null);
@@ -213,7 +196,7 @@ public class ProfilesSelectViewModel : MyReactiveObject
                    }).OrderBy(t => t.Sort).ToList();

        // Apply ConfigType filter (include or exclude)
-        if (FilterConfigTypes != null && FilterConfigTypes.Count > 0)
+        if (FilterConfigTypes is { Count: > 0 })
        {
            if (FilterExclude)
            {
@@ -321,7 +304,7 @@ public class ProfilesSelectViewModel : MyReactiveObject
    // External setter for ConfigType filter
    public void SetConfigTypeFilter(IEnumerable<EConfigType> types, bool exclude = false)
    {
-        FilterConfigTypes = types?.Distinct().ToList() ?? new List<EConfigType>();
+        FilterConfigTypes = types?.Distinct().ToList() ?? [];
        FilterExclude = exclude;
    }

--- a/v2rayN/ServiceLib/ViewModels/ProfilesViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/ProfilesViewModel.cs
@@ -6,7 +6,7 @@ public class ProfilesViewModel : MyReactiveObject

    private List<ProfileItem> _lstProfile;
    private string _serverFilter = string.Empty;
-    private Dictionary<string, bool> _dicHeaderSort = new();
+    private readonly Dictionary<string, bool> _dicHeaderSort = new();
    private SpeedtestService? _speedtestService;
    private string? _pendingSelectIndexId;

@@ -190,7 +190,7 @@ public class ProfilesViewModel : MyReactiveObject
        }, canEditRemove);
        SortServerResultCmd = ReactiveCommand.CreateFromTask(async () =>
        {
-            await SortServer(EServerColName.DelayVal.ToString());
+            await SortServer(nameof(EServerColName.DelayVal));
        });
        RemoveInvalidServerResultCmd = ReactiveCommand.CreateFromTask(async () =>
        {
--- a/v2rayN/ServiceLib/ViewModels/RoutingRuleDetailsViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/RoutingRuleDetailsViewModel.cs
@@ -73,7 +73,7 @@ public class RoutingRuleDetailsViewModel : MyReactiveObject
        }
        SelectedSource.Protocol = ProtocolItems?.ToList();
        SelectedSource.InboundTag = InboundTagItems?.ToList();
-        SelectedSource.RuleType = RuleType.IsNullOrEmpty() ? null : (ERuleType)Enum.Parse(typeof(ERuleType), RuleType);
+        SelectedSource.RuleType = RuleType.IsNullOrEmpty() ? null : Enum.Parse<ERuleType>(RuleType);

        var hasRule = SelectedSource.Domain?.Count > 0
          || SelectedSource.Ip?.Count > 0
--- a/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/RoutingRuleSettingViewModel.cs
@@ -86,7 +86,7 @@ public class RoutingRuleSettingViewModel : MyReactiveObject

        SelectedSource = new();
        SelectedRouting = routingItem;
-        _rules = routingItem.Id.IsNullOrEmpty() ? new() : JsonUtils.Deserialize<List<RulesItem>>(SelectedRouting.RuleSet);
+        _rules = routingItem.Id.IsNullOrEmpty() ? [] : JsonUtils.Deserialize<List<RulesItem>>(SelectedRouting.RuleSet);

        RefreshRulesItems();
    }
--- a/v2rayN/ServiceLib/ViewModels/StatusBarViewModel.cs
+++ b/v2rayN/ServiceLib/ViewModels/StatusBarViewModel.cs
@@ -313,9 +313,8 @@ public class StatusBarViewModel : MyReactiveObject
        }

        BlServers = true;
-        for (var k = 0; k < lstModel.Count; k++)
+        foreach (var it in lstModel)
        {
-            var it = lstModel[k];
            var name = it.GetSummary();

            var item = new ComboItem() { ID = it.IndexId, Text = name };
--- a/v2rayN/v2rayN.Desktop/App.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/App.axaml.cs
@@ -72,14 +72,18 @@ public partial class App : Application

    private async void MenuAddServerViaClipboardClick(object? sender, EventArgs e)
    {
-        if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        try
        {
-            if (desktop.MainWindow != null)
+            if (Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime { MainWindow: not null })
            {
                AppEvents.AddServerViaClipboardRequested.Publish();
                await Task.Delay(1000);
            }
        }
+        catch (Exception ex)
+        {
+            Logging.SaveLog("MenuAddServerViaClipboardClick", ex);
+        }
    }

    private async void MenuExit_Click(object? sender, EventArgs e)
--- a/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs
+++ b/v2rayN/v2rayN.Desktop/ViewModels/ThemeSettingViewModel.cs
@@ -41,7 +41,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                {
                    _config.UiItem.CurrentTheme = CurrentTheme;
                    ModifyTheme();
-                    ConfigHandler.SaveConfig(_config);
+                    _ = ConfigHandler.SaveConfig(_config);
                }
            });

@@ -54,7 +54,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                {
                    _config.UiItem.CurrentFontSize = CurrentFontSize;
                    ModifyFontSize();
-                    ConfigHandler.SaveConfig(_config);
+                    _ = ConfigHandler.SaveConfig(_config);
                }
            });

@@ -67,7 +67,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                {
                    _config.UiItem.CurrentLanguage = CurrentLanguage;
                    Thread.CurrentThread.CurrentUICulture = new(CurrentLanguage);
-                    ConfigHandler.SaveConfig(_config);
+                    _ = ConfigHandler.SaveConfig(_config);
                    NoticeManager.Instance.Enqueue(ResUI.NeedRebootTips);
                }
            });
--- a/v2rayN/v2rayN.Desktop/Views/AddServer2Window.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/AddServer2Window.axaml.cs
@@ -18,7 +18,7 @@ public partial class AddServer2Window : WindowBase<AddServer2ViewModel>
        btnCancel.Click += (s, e) => Close();
        ViewModel = new AddServer2ViewModel(profileItem, UpdateViewHandler);

-        cmbCoreType.ItemsSource = Utils.GetEnumNames<ECoreType>().Where(t => t != ECoreType.v2rayN.ToString()).ToList().AppendEmpty();
+        cmbCoreType.ItemsSource = Utils.GetEnumNames<ECoreType>().Where(t => t != nameof(ECoreType.v2rayN)).ToList().AppendEmpty();

        this.WhenActivated(disposables =>
        {
--- a/v2rayN/v2rayN.Desktop/Views/ClashConnectionsView.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/ClashConnectionsView.axaml.cs
@@ -112,7 +112,7 @@ public partial class ClashConnectionsView : ReactiveUserControl<ClashConnections
    {
        try
        {
-            List<ColumnItem> lvColumnItem = new();
+            List<ColumnItem> lvColumnItem = [];
            foreach (var item2 in lstConnections.Columns)
            {
                if (item2.Tag == null)
--- a/v2rayN/v2rayN.Desktop/Views/GlobalHotkeySettingWindow.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/GlobalHotkeySettingWindow.axaml.cs
@@ -5,7 +5,7 @@ namespace v2rayN.Desktop.Views;

 public partial class GlobalHotkeySettingWindow : WindowBase<GlobalHotkeySettingViewModel>
 {
-    private readonly List<object> _textBoxKeyEventItem = new();
+    private readonly List<object> _textBoxKeyEventItem = [];

    public GlobalHotkeySettingWindow()
    {
--- a/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/MainWindow.axaml.cs
@@ -144,13 +144,13 @@ public partial class MainWindow : WindowBase<MainWindowViewModel>
            AppEvents.ShutdownRequested
              .AsObservable()
              .ObserveOn(RxSchedulers.MainThreadScheduler)
-              .Subscribe(content => Shutdown(content))
+              .Subscribe(Shutdown)
              .DisposeWith(disposables);

            AppEvents.ShowHideWindowRequested
             .AsObservable()
             .ObserveOn(RxSchedulers.MainThreadScheduler)
-             .Subscribe(blShow => ShowHideWindow(blShow))
+             .Subscribe(ShowHideWindow)
             .DisposeWith(disposables);
        });

--- a/v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/ProfilesView.axaml.cs
@@ -447,7 +447,7 @@ public partial class ProfilesView : ReactiveUserControl<ProfilesViewModel>
    {
        try
        {
-            List<ColumnItem> lvColumnItem = new();
+            List<ColumnItem> lvColumnItem = [];
            foreach (var item2 in lstProfiles.Columns)
            {
                if (item2.Tag == null)
--- a/v2rayN/v2rayN.Desktop/Views/StatusBarView.axaml.cs
+++ b/v2rayN/v2rayN.Desktop/Views/StatusBarView.axaml.cs
@@ -47,10 +47,7 @@ public partial class StatusBarView : ReactiveUserControl<StatusBarViewModel>
        switch (action)
        {
            case EViewAction.DispatcherRefreshIcon:
-                Dispatcher.UIThread.Post(() =>
-                {
-                    RefreshIcon();
-                },
+                Dispatcher.UIThread.Post(RefreshIcon,
                DispatcherPriority.Default);
                break;

--- a/v2rayN/v2rayN/App.xaml.cs
+++ b/v2rayN/v2rayN/App.xaml.cs
@@ -22,7 +22,7 @@ public partial class App : Application
    {
        var exePathKey = Utils.GetMd5(Utils.GetExePath());

-        var rebootas = (e.Args ?? Array.Empty<string>()).Any(t => t == Global.RebootAs);
+        var rebootas = e.Args.Any(t => t == Global.RebootAs);
        ProgramStarted = new EventWaitHandle(false, EventResetMode.AutoReset, exePathKey, out var bCreatedNew);
        if (!rebootas && !bCreatedNew)
        {
--- a/v2rayN/v2rayN/ViewModels/ThemeSettingViewModel.cs
+++ b/v2rayN/v2rayN/ViewModels/ThemeSettingViewModel.cs
@@ -38,9 +38,7 @@ public class ThemeSettingViewModel : MyReactiveObject
        if (!_config.UiItem.ColorPrimaryName.IsNullOrEmpty())
        {
            var swatch = new SwatchesProvider().Swatches.FirstOrDefault(t => t.Name == _config.UiItem.ColorPrimaryName);
-            if (swatch != null
-               && swatch.ExemplarHue != null
-               && swatch.ExemplarHue?.Color != null)
+            if (swatch?.ExemplarHue?.Color is not null)
            {
                ChangePrimaryColor(swatch.ExemplarHue.Color);
            }
@@ -67,7 +65,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                 {
                     _config.UiItem.CurrentTheme = CurrentTheme;
                     ModifyTheme();
-                     ConfigHandler.SaveConfig(_config);
+                     _ = ConfigHandler.SaveConfig(_config);
                 }
             });

@@ -87,7 +85,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                 {
                     _config.UiItem.ColorPrimaryName = SelectedSwatch?.Name;
                     ChangePrimaryColor(SelectedSwatch.ExemplarHue.Color);
-                     ConfigHandler.SaveConfig(_config);
+                     _ = ConfigHandler.SaveConfig(_config);
                 }
             });

@@ -100,7 +98,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                  {
                      _config.UiItem.CurrentFontSize = CurrentFontSize;
                      ModifyFontSize();
-                      ConfigHandler.SaveConfig(_config);
+                      _ = ConfigHandler.SaveConfig(_config);
                  }
              });

@@ -113,7 +111,7 @@ public class ThemeSettingViewModel : MyReactiveObject
                {
                    _config.UiItem.CurrentLanguage = CurrentLanguage;
                    Thread.CurrentThread.CurrentUICulture = new(CurrentLanguage);
-                    ConfigHandler.SaveConfig(_config);
+                    _ = ConfigHandler.SaveConfig(_config);
                    NoticeManager.Instance.Enqueue(ResUI.NeedRebootTips);
                }
            });
--- a/v2rayN/v2rayN/Views/AddServer2Window.xaml.cs
+++ b/v2rayN/v2rayN/Views/AddServer2Window.xaml.cs
@@ -10,7 +10,7 @@ public partial class AddServer2Window
        Loaded += Window_Loaded;
        ViewModel = new AddServer2ViewModel(profileItem, UpdateViewHandler);

-        cmbCoreType.ItemsSource = Utils.GetEnumNames<ECoreType>().Where(t => t != ECoreType.v2rayN.ToString()).ToList().AppendEmpty();
+        cmbCoreType.ItemsSource = Utils.GetEnumNames<ECoreType>().Where(t => t != nameof(ECoreType.v2rayN)).ToList().AppendEmpty();

        this.WhenActivated(disposables =>
        {
--- a/v2rayN/v2rayN/Views/ClashConnectionsView.xaml.cs
+++ b/v2rayN/v2rayN/Views/ClashConnectionsView.xaml.cs
@@ -111,7 +111,7 @@ public partial class ClashConnectionsView
    {
        try
        {
-            List<ColumnItem> lvColumnItem = new();
+            List<ColumnItem> lvColumnItem = [];
            foreach (var col in lstConnections.Columns.Cast<MyDGTextColumn>())
            {
                var name = col.ExName;
--- a/v2rayN/v2rayN/Views/GlobalHotkeySettingWindow.xaml.cs
+++ b/v2rayN/v2rayN/Views/GlobalHotkeySettingWindow.xaml.cs
@@ -5,7 +5,7 @@ namespace v2rayN.Views;

 public partial class GlobalHotkeySettingWindow
 {
-    private readonly List<object> _textBoxKeyEventItem = new();
+    private readonly List<object> _textBoxKeyEventItem = [];

    public GlobalHotkeySettingWindow()
    {
--- a/v2rayN/v2rayN/Views/MainWindow.xaml.cs
+++ b/v2rayN/v2rayN/Views/MainWindow.xaml.cs
@@ -144,13 +144,13 @@ public partial class MainWindow
            AppEvents.ShutdownRequested
             .AsObservable()
             .ObserveOn(RxSchedulers.MainThreadScheduler)
-             .Subscribe(content => Shutdown(content))
+             .Subscribe(Shutdown)
             .DisposeWith(disposables);

            AppEvents.ShowHideWindowRequested
             .AsObservable()
             .ObserveOn(RxSchedulers.MainThreadScheduler)
-             .Subscribe(blShow => ShowHideWindow(blShow))
+             .Subscribe(ShowHideWindow)
             .DisposeWith(disposables);
        });

--- a/v2rayN/v2rayN/Views/ProfilesView.xaml.cs
+++ b/v2rayN/v2rayN/Views/ProfilesView.xaml.cs
@@ -400,7 +400,7 @@ public partial class ProfilesView
    {
        try
        {
-            List<ColumnItem> lvColumnItem = new();
+            List<ColumnItem> lvColumnItem = [];
            foreach (var item2 in lstProfiles.Columns.Cast<MyDGTextColumn>())
            {
                lvColumnItem.Add(new()