added output lines (#555)

Author: volkan-yazilim

snippets/csharp/language-reference/keywords/in-ref-out-modifier/OutParameterModifier.cs

@@ -43,6 +43,12 @@ void Method(out int answer, out string message, out string stillNull)
             Console.WriteLine(argNumber);
             Console.WriteLine(argMessage);
             Console.WriteLine(argDefault == null);
+            
+            // The example displays the following output:
+            //      44
+            //      I've been returned
+            //      True
+            
             // </Snippet3>
         }