Action및 delegate

//action private void OpenDialog(OnsUserControlBase control, Action callback) { using (_popup = new HostWindow(control)) { _popup.ShowDialog(); _popup.Closed += (o, args) => { if (_popup.DialogResult == DevExpress.Xpf.Core.DialogResult.OK && callback != null) callback(); }; } } //delegate dt.ColumnChanged += delegate(object sender, DataColumnChangeEventArgs e) { GridView bandView = gridControl.MainView as GridView; if (bandView.FocusedRowHandle >= 0) { bandView.GetDataRow(bandView.FocusedRowHandle).EndEdit(); } };