Merge pull request Redth#843 from PaitoAnderson/patch-2

Typo in README.md

README.md

@@ -156,7 +156,7 @@ gcmBroker.OnNotificationFailed += (notification, aggregateEx) => {
 
 			Console.WriteLine ($"Device RegistrationId Expired: {oldId}");
 
-			if (!string.IsNullOrWhitespace (newId)) {
+			if (!string.IsNullOrWhiteSpace (newId)) {
 				// If this value isn't null, our subscription changed and we should update our database
 				Console.WriteLine ($"Device RegistrationId Changed To: {newId}");
 			}