public NodeClickEventArgs(NodeClickCommandEnum command, int categoryId, string customCommand = "")
 {
     this.command = command;
     this.categoryId = categoryId;
     this.customCommand = customCommand;
 }
 public void NodeCommand(NodeClickCommandEnum command, int categoryId, string customCommand = "")
 {
     if (this.NodeClick != null)
     {
         var args = new NodeClickEventArgs(command, categoryId, customCommand);
         this.NodeClick(this, args);
     }
 }