void Row_Loaded(object sender, RoutedEventArgs e)
{
var row = (DataGridRow)sender;
row.Loaded -= Row_Loaded;
DataGridCell cell = GetCell(ParameterGrid, row, 1);
TextBox box = cell.FindChild("ValueBox", typeof(TextBox)) as TextBox;
//if (cell != null) cell.Focus();
if (box != null)
{
box.Focus();
}
//ParameterGrid.BeginEdit();
}