diff --git a/src/foundation.cs b/src/foundation.cs
index d40092bced4e..846edcf23a7c 100644
--- a/src/foundation.cs
+++ b/src/foundation.cs
@@ -1829,7 +1829,7 @@ interface NSByteCountFormatter {
 		[Watch (6,0), TV (13,0), Mac (10,15), iOS (13,0)]
 		[Static]
 		[Export ("stringFromMeasurement:countStyle:")]
-		string StringFromMeasurement (NSUnitInformationStorage  measurement, NSByteCountFormatterCountStyle countStyle);
+		string Create (NSUnitInformationStorage measurement, NSByteCountFormatterCountStyle countStyle);
 
 		[Watch (6,0), TV (13,0), Mac (10,15), iOS (13,0)]
 		[Export ("stringFromMeasurement:")]
@@ -7465,6 +7465,10 @@ partial interface NSUrlSessionTask : NSCopying, NSProgressReporting
 		[NullAllowed, Export ("delegate", ArgumentSemantic.Retain)]
 		NSObject WeakDelegate { get; set; }
 
+		[Watch (8, 0), TV (15, 0), Mac (12, 0), iOS (15, 0), MacCatalyst (15,0)]
+		[Wrap ("WeakDelegate")]
+		[NullAllowed]
+		INSUrlSessionTaskDelegate Delegate { get; set; }
 	}
 
 	[Static]
@@ -7718,6 +7722,8 @@ partial interface NSUrlSessionDelegate {
 		void DidFinishEventsForBackgroundSession (NSUrlSession session);
 	}
 
+	public interface INSUrlSessionTaskDelegate {}
+
 	[iOS (7,0)]
 	[Mac (10, 9)]
 	[Model]