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Timer t = null; private void gridControl1_GridControlMouseUp(object sender, Syncfusion.Windows.Forms.CancelMouseEventArgs e) { if(t == null) { t = new Timer(); t.Interval = 30; t.Tick += new EventHandler(t_Tick); } t.Start(); } private void t_Tick(object sender, EventArgs e) { t.Stop(); GridTextBoxCellRenderer cr = this.gridControl1.CurrentCellRenderer as GridTextBoxCellRenderer; if(cr != null) { cr.TextBox.SelectAll(); Console.WriteLine("gridControl1_GridControlMouseUp"); } }