public void AddEnd(int value)
 {
     if (next == null)
     {
         next = new Dataq(value);
     }
     else
     {
         next.AddEnd(value);
     }
 }
 public void AddData(int value)
 {
     if (headNode == null)
     {
         headNode = new Dataq(value);
     }
     else
     {
         headNode.AddEnd(value);
     }
     Console.WriteLine("\n[" + value + "] has been added the the Queue");
 }