Human-computer interaction to perform a logic operation

string str = ResManager.LoadKDString ( "Delete subject node will delete all subordinate node, whether to continue to delete?", "003173000017448");

                base.View.ShowWarnningMessage(str, "", MessageBoxOptions.YesNo, delegate (MessageBoxResult result)

                {

                    if (result == MessageBoxResult.Yes)

                    {

                        this.DeleteNode(currNode);

                    }

                }, MessageBoxType.Advise);