diff --git a/src/appkit.cs b/src/appkit.cs
index 4ebe637631..169f185bb6 100644
--- a/src/appkit.cs
+++ b/src/appkit.cs
@@ -928,12 +928,12 @@ namespace AppKit {
 	}
 
 	delegate void NSApplicationEnumerateWindowsHandler (NSWindow window, ref bool stop);
-// radar://42781537
-//#if XAMCORE_4_0
-//	delegate void ContinueUserActivityRestorationHandler (NSUserActivityRestoring [] restorableObjects);
-//#else
+#if NET
+	[NoMacCatalyst]
+	delegate void ContinueUserActivityRestorationHandler (INSUserActivityRestoring [] restorableObjects);
+#else
 	delegate void ContinueUserActivityRestorationHandler (NSObject [] restorableObjects);
-//#endif
+#endif
 	
 	[NoMacCatalyst]
 	[BaseType (typeof (NSObject))]
@@ -5546,7 +5546,7 @@ namespace AppKit {
 	[NoMacCatalyst]
 	[DesignatedDefaultCtor]
 	[BaseType (typeof (NSObject))]
-	partial interface NSDocument /* : NSUserActivityRestoring radar://42781537 */ {
+	partial interface NSDocument : NSUserActivityRestoring {
 		[Export ("initWithType:error:")]
 		NativeHandle Constructor (string typeName, [NullAllowed] out NSError outError);
 
@@ -5888,10 +5888,12 @@ namespace AppKit {
 		[Export ("updateUserActivityState:")]
 		void UpdateUserActivityState (NSUserActivity userActivity);
 
+#if !NET
 		// Should be removed but radar://42781537 - Classes fail to conformsToProtocol despite header declaration
 		[Mac (10,10)]
 		[Export ("restoreUserActivityState:")]
 		void RestoreUserActivityState (NSUserActivity userActivity);
+#endif
 
 		[Mac (10,12)]
 		[Export ("isBrowsingVersions")] 
@@ -12702,7 +12704,7 @@ namespace AppKit {
 	[NoMacCatalyst]
 	[DesignatedDefaultCtor]
 	[BaseType (typeof (NSObject))]
-	partial interface NSResponder : NSCoding, NSTouchBarProvider /* radar://42781537 , NSUserActivityRestoring */ {
+	partial interface NSResponder : NSCoding, NSTouchBarProvider , NSUserActivityRestoring {
 		[Export ("tryToPerform:with:")]
 		bool TryToPerformwith (Selector anAction, [NullAllowed] NSObject anObject);
 
@@ -12862,10 +12864,12 @@ namespace AppKit {
 		[Export ("updateUserActivityState:")]
 		void UpdateUserActivityState (NSUserActivity userActivity);
 
+#if !NET
 		// Should be removed but radar://42781537 - Classes fail to conformsToProtocol despite header declaration
 		[Mac (10,10)]
 		[Export ("restoreUserActivityState:")]
 		void RestoreUserActivityState (NSUserActivity userActivity);
+#endif
 
 		[Mac (10,10,3)]
 		[Export ("pressureChangeWithEvent:")]
@@ -12890,14 +12894,17 @@ namespace AppKit {
 		void EncodeRestorableState (NSCoder coder, NSOperationQueue queue);
 	}
 
-// 	[Protocol] // radar://42781537 - Classes fail to conformsToProtocol despite header declaration
-// 	interface NSUserActivityRestoring
-// 	{
-// 		[Mac (10,10)]
-// 		[Abstract]
-// 		[Export ("restoreUserActivityState:")]
-// 		void RestoreUserActivityState (NSUserActivity userActivity);
-// 	}
+	[NoMacCatalyst]
+	[Protocol]
+	interface NSUserActivityRestoring
+	{
+		[Mac (10,10)]
+		[Abstract]
+		[Export ("restoreUserActivityState:")]
+		void RestoreUserActivityState (NSUserActivity userActivity);
+	}
+
+	interface INSUserActivityRestoring { }
 
 	[NoMacCatalyst]
 	[Category]
diff --git a/tests/xtro-sharpie/api-annotations-dotnet/common-AppKit.ignore b/tests/xtro-sharpie/api-annotations-dotnet/common-AppKit.ignore
index 69782f00f9..5d36269cd2 100644
--- a/tests/xtro-sharpie/api-annotations-dotnet/common-AppKit.ignore
+++ b/tests/xtro-sharpie/api-annotations-dotnet/common-AppKit.ignore
@@ -6,9 +6,6 @@
 ## 42814697 NSViewLayerContentScaleDelegate defined in header but never used
 !missing-protocol! NSViewLayerContentScaleDelegate not bound
 
-## 42781537 Classes fail to conformsToProtocol despite header declaration
-!missing-protocol! NSUserActivityRestoring not bound
-
 ## recent fox top xtro reported additional missing API (to be reviewed)
 !missing-selector! +NSBezierPath::bezierPath not bound
 !missing-selector! +NSCursor::pop not bound
diff --git a/tests/xtro-sharpie/api-annotations-dotnet/macOS-AppKit.ignore b/tests/xtro-sharpie/api-annotations-dotnet/macOS-AppKit.ignore
index 93ca82075b..16dac1051a 100644
--- a/tests/xtro-sharpie/api-annotations-dotnet/macOS-AppKit.ignore
+++ b/tests/xtro-sharpie/api-annotations-dotnet/macOS-AppKit.ignore
@@ -228,10 +228,6 @@
 ## DoCommandBySelector conflicts with NSTextViewDelegate in generated code
 !missing-protocol-member! NSTextInput::doCommandBySelector: not found
 
-## 42781537 Classes fail to conformsToProtocol despite header declaration
-!missing-protocol-conformance! NSDocument should conform to NSUserActivityRestoring (defined in 'NSUserActivity' category)
-!missing-protocol-conformance! NSResponder should conform to NSUserActivityRestoring (defined in 'NSUserActivity' category)
-
 ## Added in Xcode 10.2 Final but deprecated
 
 !missing-release-attribute-on-return-value! AppKit.NSDictionaryControllerKeyValuePair AppKit.NSDictionaryController::get_NewObject()'s selector's ('newObject') Objective-C method family ('new') indicates that the native method returns a retained object, and as such a '[return: Release]' attribute is required.
diff --git a/tests/xtro-sharpie/common-AppKit.ignore b/tests/xtro-sharpie/common-AppKit.ignore
index 69782f00f9..5d36269cd2 100644
--- a/tests/xtro-sharpie/common-AppKit.ignore
+++ b/tests/xtro-sharpie/common-AppKit.ignore
@@ -6,9 +6,6 @@
 ## 42814697 NSViewLayerContentScaleDelegate defined in header but never used
 !missing-protocol! NSViewLayerContentScaleDelegate not bound
 
-## 42781537 Classes fail to conformsToProtocol despite header declaration
-!missing-protocol! NSUserActivityRestoring not bound
-
 ## recent fox top xtro reported additional missing API (to be reviewed)
 !missing-selector! +NSBezierPath::bezierPath not bound
 !missing-selector! +NSCursor::pop not bound
diff --git a/tests/xtro-sharpie/macOS-AppKit.ignore b/tests/xtro-sharpie/macOS-AppKit.ignore
index d1b2fc0c4e..e1ec005ba4 100644
--- a/tests/xtro-sharpie/macOS-AppKit.ignore
+++ b/tests/xtro-sharpie/macOS-AppKit.ignore
@@ -321,10 +321,6 @@
 ## DoCommandBySelector conflicts with NSTextViewDelegate in generated code
 !missing-protocol-member! NSTextInput::doCommandBySelector: not found
 
-## 42781537 Classes fail to conformsToProtocol despite header declaration
-!missing-protocol-conformance! NSDocument should conform to NSUserActivityRestoring (defined in 'NSUserActivity' category)
-!missing-protocol-conformance! NSResponder should conform to NSUserActivityRestoring (defined in 'NSUserActivity' category)
-
 ## Added in Xcode 10.2 Final but deprecated
 
 !missing-release-attribute-on-return-value! AppKit.NSDictionaryControllerKeyValuePair AppKit.NSDictionaryController::get_NewObject()'s selector's ('newObject') Objective-C method family ('new') indicates that the native method returns a retained object, and as such a '[return: Release]' attribute is required.