public void DeleteConnection(DigitMark connectionToDelete)
 {
     if (connections.Contains(connectionToDelete))
     {
         connections.Remove(connectionToDelete);
     }
 }
 public void DeleteConnection(DigitMark connectionToDelete)
 {
     if (connections.Contains(connectionToDelete))
     {
         connections.Remove(connectionToDelete);
     }
 }
 public bool ConnectedTo(DigitMark connectedNode)
 {
     return connections.Contains(connectedNode);
 }
 public void AddConnection(DigitMark newConnection)
 {
     connections.Add(newConnection);
 }
 public bool ConnectedTo(DigitMark connectedNode)
 {
     return connections.Contains(connectedNode);
 }
 public void AddConnection(DigitMark newConnection)
 {
     connections.Add(newConnection);
 }