ATMLCommonLibrary.forms.ATMLNavigationWindow.testSetNavigationTree_MouseUp C# (CSharp) Method

        private void testSetNavigationTree_MouseUp( object sender, MouseEventArgs e )
        {
            var p = new Point( e.X, e.Y );
            TreeNode node = testSetNavigationTree.GetNodeAt( p );
            //if (testSetNavigationTree.SelectedNode != null)
            if (node != null)
            {
                object tag = node.Tag; // testSetNavigationTree.SelectedNode.Tag;
                _addFilesLabel.Visible = ( tag is DirectoryInfo );
            //                _createAbfFile.Visible = ( tag is DirectoryInfo && ( (DirectoryInfo) tag ).Name.Equals( "source" ) );
                _openLabel.Visible = ( tag is FileInfo );
                _deleteLabel.Visible = ( tag is FileInfo );
                _renameLabel.Visible = ( tag is FileInfo );
            }
        }