Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/class/System.Web.Abstractions/System.Web/HttpResponseWrapper.cs

@@ -169,6 +169,13 @@ namespace System.Web
 			set { w.SuppressContent = value; }
 		}
 
+#if NET_4_5
+		public override bool SuppressFormsAuthenticationRedirect {
+			get { return w.SuppressFormsAuthenticationRedirect; }
+			set { w.SuppressFormsAuthenticationRedirect = value; }
+		}
+#endif
+
 		public override bool TrySkipIisCustomErrors {
 			get { return w.TrySkipIisCustomErrors; }
 			set { w.TrySkipIisCustomErrors = value; }