GitUI.FormBrowse.FileTreeContextMenu_Opening C# (CSharp) Метод

        private void FileTreeContextMenu_Opening(object sender, System.ComponentModel.CancelEventArgs e)
        {
            bool enableItems = false;
            var item = GitTree.SelectedNode.Tag;

            if (item is GitItem)
                if (((GitItem)item).ItemType == "blob")
                    enableItems = true;

            saveAsToolStripMenuItem.Enabled = enableItems;
            openFileToolStripMenuItem.Enabled = enableItems;
            openFileWithToolStripMenuItem.Enabled = enableItems;
            fileHistoryToolStripMenuItem.Enabled = enableItems;
        }