up 7.12.4

* Determine .exe suffix based on OS in GenRoutingDirectExe

* Uses Utils.GetExeName

v2rayN/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
 
     <PropertyGroup>
-        <Version>7.12.3</Version>
+        <Version>7.12.4</Version>
     </PropertyGroup>
 
     <PropertyGroup>

v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs

@@ -1048,28 +1048,30 @@ public class CoreConfigSingboxService
 
     private void GenRoutingDirectExe(out List<string> lstDnsExe, out List<string> lstDirectExe)
     {
-        lstDnsExe = new();
-        lstDirectExe = new();
-        var coreInfo = CoreInfoHandler.Instance.GetCoreInfo();
-        foreach (var it in coreInfo)
+        var dnsExeSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var directExeSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+
+        var coreInfoResult = CoreInfoHandler.Instance.GetCoreInfo();
+
+        foreach (var coreConfig in coreInfoResult)
         {
-            if (it.CoreType == ECoreType.v2rayN)
+            if (coreConfig.CoreType == ECoreType.v2rayN)
             {
                 continue;
             }
-            foreach (var it2 in it.CoreExes)
+
+            foreach (var baseExeName in coreConfig.CoreExes)
             {
-                if (!lstDnsExe.Contains(it2) && it.CoreType != ECoreType.sing_box)
+                if (coreConfig.CoreType != ECoreType.sing_box)
                 {
-                    lstDnsExe.Add($"{it2}.exe");
+                    dnsExeSet.Add(Utils.GetExeName(baseExeName));
+                }
+                directExeSet.Add(Utils.GetExeName(baseExeName));
+            }
         }
 
-                if (!lstDirectExe.Contains(it2))
-                {
-                    lstDirectExe.Add($"{it2}.exe");
-                }
-            }
-        }
+        lstDnsExe = new List<string>(dnsExeSet);
+        lstDirectExe = new List<string>(directExeSet);
     }
 
     private async Task<int> GenRoutingUserRule(RulesItem item, List<Rule4Sbox> rules)