Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

mcs/class/System/Mono.AppleTls/INativeObject.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace ObjCRuntime {
+
+	internal interface INativeObject {
+		IntPtr Handle { 
+			get;
+		}
+	}
+
+	static class NativeObjectHelper {
+
+		// help to avoid the (too common pattern)
+		// 	var p = x == null ? IntPtr.Zero : x.Handle;
+		static public IntPtr GetHandle (this INativeObject self)
+		{
+			return self == null ? IntPtr.Zero : self.Handle;
+		}
+	}
+
+}