fix: update conditional compilation symbols for .NET version handling (#820)

src/Ursa/Controls/PathPicker/PathPicker.cs

@@ -20,13 +20,11 @@ public partial class PathPicker : TemplatedControl
 {
     private const string PatternsRegexString = @"^\[(?:[^*.,]+|([^*.,]+(,[^,]+)+))\]$";
     
-#if NETSTANDARD2_0
-    private static readonly Regex _patternsRegex = new (PatternsRegexString);
-#endif
-    
-#if NET8_0
+#if NET8_0_OR_GREATER
     [GeneratedRegex(PatternsRegexString)]
     private static partial Regex GetPatternsRegex();
+#else
+    private static readonly Regex _patternsRegex = new (PatternsRegexString);
 #endif
     
     public const string PART_Button = "PART_Button";
@@ -237,12 +235,11 @@ public partial class PathPicker : TemplatedControl
         if (string.IsNullOrWhiteSpace(str)) 
             return null;
 
-#if NETSTANDARD2_0
-        if (!_patternsRegex.IsMatch(str))
-#endif
 
-#if NET8_0
+#if NET8_0_OR_GREATER
         if (!GetPatternsRegex().IsMatch(str))
+#else
+        if (!_patternsRegex.IsMatch(str))
 #endif
         throw new ArgumentException($"{nameof(str)} Invalid parameter, please refer to the following content: [Name, Pattern], such as [123, .exe, .pdb] or [All][ImageAll][11, *.txt]");
         

tests/HeadlessTest.Ursa/Controls/DrawerTests/CloseEventTest/DrawerCloseTestPopupControlVM.cs

@@ -9,11 +9,9 @@ public class DrawerCloseTestPopupControlVM : IDialogContext
         RequestClose?.Invoke(this, Result);
     }
     
-#if NET8_0 
+#if NET8_0_OR_GREATER
     public int Result { get; } = Random.Shared.Next();
-#endif
-    
-#if NETSTANDARD2_0
+#else
     private static Random r = new Random();
     public int Result { get; } = r.Next();
 #endif