CardMaker.Forms.MDIProject.contextMenuStripTreeView_Opening C# (CSharp) Метод

        private void contextMenuStripTreeView_Opening(object sender, CancelEventArgs e)
        {
            var zNode = treeView.SelectedNode;

            if (null != zNode)
            {
                addCardLayoutFromTemplateToolStripMenuItem.Enabled = 0 < LayoutTemplateManager.Instance.LayoutTemplates.Count;
            }
            else
            {
                e.Cancel = true;
            }
        }