private CheckBox GenerateCheckBox(bool isEditing, DataGridCell cell)
{
var checkBox = (cell != null ? cell.Content as CheckBox : null) ?? new CheckBox {
Template = (ControlTemplate)cell.TryFindResource("CheckMarkControlTemplate")
};
checkBox.IsThreeState = IsThreeState;
ApplyStyle(isEditing, true, checkBox);
checkBox.SetBinding(ToggleButton.IsCheckedProperty, Binding);
return(checkBox);
}