Fix a few for Example2

Example2/Chat.cs

@@ -19,12 +19,13 @@ namespace Example2
 
     public Chat (string prefix)
     {
-      _prefix = prefix ?? "anon#";
+      _prefix = !prefix.IsNullOrEmpty () ? prefix : "anon#";
     }
 
     private string getName ()
     {
-      return Context.QueryString ["name"] ?? (_prefix + getNum ());
+      var name = Context.QueryString ["name"];
+      return !name.IsNullOrEmpty () ? name : (_prefix + getNum ());
     }
 
     private static int getNum ()

Example2/Program.cs

@@ -16,7 +16,7 @@ namespace Example2
       //var wssv = new WebSocketServer ("ws://localhost:4649");
       //var wssv = new WebSocketServer ("wss://localhost:4649"); // For Secure Connection
 #if DEBUG
-      // Changing logging level
+      // Changing the logging level
       wssv.Log.Level = LogLevel.Trace;
 #endif
       /* For Secure Connection