ClrOnly condition is not working on mono

src/Compilers/CSharp/Test/Emit/Emit/DeterministicTests.cs

@@ -373,7 +373,7 @@ static ImmutableArray<INamedTypeSymbol> getForwardedTypes(AssemblySymbol assembl
             }
         }
 
-        [ConditionalFact(typeof(ClrOnly), Reason = "Static execution is runtime defined and this tests Clr behavior only")]
+        [ConditionalFact(typeof(NotOnAnyMono), Reason = "Static execution is runtime defined and this tests Clr behavior only")]
         public void TestPartialPartsDeterministic()
         {
             var x1 =

src/Compilers/Test/Core/Assert/ConditionalFactAttribute.cs

@@ -162,6 +162,7 @@ public static class ExecutionConditionUtil
         public static bool IsMono => MonoHelpers.IsRunningOnMono();
         // IsMonoCore means https://github.com/dotnet/runtime/tree/main/src/mono
         public static bool IsMonoCore => Type.GetType("Mono.RuntimeStructs") != null;
+        public static bool IsAnyMono => IsMonoCore || IsMonoDesktop;
         public static bool IsCoreClr => !IsDesktop;
         public static bool IsCoreClrUnix => IsCoreClr && IsUnix;
         public static bool IsMonoOrCoreClr => IsMono || IsCoreClr;
@@ -341,6 +342,12 @@ public class NotOnMonoCore : ExecutionCondition
         public override string SkipReason => "Test not supported on Mono Core";
     }
 
+    public class NotOnAnyMono : ExecutionCondition
+    {
+        public override bool ShouldSkip => ExecutionConditionUtil.IsAnyMono;
+        public override string SkipReason => "Test not supported on Mono core or Mono Desktop";
+    }
+
     public class CoreClrOnly : ExecutionCondition
     {
         public override bool ShouldSkip => !ExecutionConditionUtil.IsCoreClr;