diff --git a/src/bgen/AttributeManager.cs b/src/bgen/AttributeManager.cs
index 7386997296db..5c9b2731771a 100644
--- a/src/bgen/AttributeManager.cs
+++ b/src/bgen/AttributeManager.cs
@@ -390,7 +390,7 @@ IEnumerable<T> CreateAttributeInstance<T> (CustomAttributeData attribute, ICusto
 			return convertedAttributes.OfType<T> ();
 
 		var expectedType = ConvertTypeToMeta (typeof (T), provider);
-		if (attribute.GetAttributeType () != expectedType && !IsSubclassOf (expectedType, attribute.GetAttributeType ()))
+		if (attribute.GetAttributeType () != expectedType && !attribute.GetAttributeType ().IsSubclassOf (expectedType))
 			return Enumerable.Empty<T> ();
 
 		System.Type attribType = ConvertTypeFromMeta (attribute.GetAttributeType (), provider);
@@ -538,7 +538,7 @@ public bool HasAttribute<T> (ICustomAttributeProvider provider) where T : Attrib
 			var attrib = attribs [i];
 			if (attrib.GetAttributeType () == attribute_type)
 				return true;
-			if (IsSubclassOf (attribute_type, attrib.GetAttributeType ()))
+			if (attrib.GetAttributeType ().IsSubclassOf (attribute_type))
 				return true;
 		}
 
@@ -580,10 +580,6 @@ public static ICustomAttributeProvider GetReturnTypeCustomAttributes (MethodInfo
 		return method.ReturnParameter;
 	}
 
-	static bool IsSubclassOf (Type base_class, Type derived_class)
-	{
-		return derived_class.IsSubclassOf (base_class);
-	}
 }
 
 public static class AttributeConversionManager {
diff --git a/tests/monotouch-test/CoreBluetooth/CentralManagerTest.cs b/tests/monotouch-test/CoreBluetooth/CentralManagerTest.cs
index 490c46da99f5..9f58a4070cd0 100644
--- a/tests/monotouch-test/CoreBluetooth/CentralManagerTest.cs
+++ b/tests/monotouch-test/CoreBluetooth/CentralManagerTest.cs
@@ -78,7 +78,7 @@ public void SetUp ()
 		{
 			if (TestRuntime.IsInCI && TestRuntime.CheckXcodeVersion (14, 0))
 				TestRuntime.AssertNotDesktop (); // Looks like this particular test doesn't like Desktop + M1 bot machines
-			// iOS 13 and friends require bluetooth permission
+												 // iOS 13 and friends require bluetooth permission
 			if (TestRuntime.CheckXcodeVersion (11, 0))
 				TestRuntime.CheckBluetoothPermission (true);
 			//known UUID for a heart monitor, more common, we want to find something and make sure we do not crash