diff --git a/framework-dotnet/src/lib/MBS.Core/Reflection/TypeExtensions.cs b/framework-dotnet/src/lib/MBS.Core/Reflection/TypeExtensions.cs
new file mode 100644
index 0000000..b7930ed
--- /dev/null
+++ b/framework-dotnet/src/lib/MBS.Core/Reflection/TypeExtensions.cs
@@ -0,0 +1,32 @@
+namespace MBS.Core.Reflection;
+
+public static class TypeExtensions
+{
+	public static bool IsSubclassOfGeneric(this Type toCheck, Type generic)
+	{
+		// thanks https://stackoverflow.com/a/457708
+
+		while (toCheck != null && toCheck != typeof(object))
+		{
+			var cur = toCheck.IsGenericType ? toCheck.GetGenericTypeDefinition() : toCheck;
+			if (generic == cur)
+			{
+				return true;
+			}
+			
+			Type[] intfs = toCheck.GetInterfaces();
+			foreach (Type intf in intfs)
+			{
+				// !!! HACK HACK HACK !!!
+				bool hack = intf.Namespace.Equals(generic.Namespace) && intf.Name.Equals(generic.Name);
+				if (hack)
+				{
+					return true;
+				}
+			}
+			toCheck = toCheck.BaseType;
+		}
+		return false;
+	}
+
+}
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