/// <summary>
/// update the source.
/// </summary>
public void BindingUpdateSource()
{
BindingExpression be = ServerIP.GetBindingExpression(UCTextField.ValueProperty);
be.UpdateSource();
be = ServerPort.GetBindingExpression(UCTextField.ValueProperty);
be.UpdateSource();
be = MazeRows.GetBindingExpression(UCTextField.ValueProperty);
be.UpdateSource();
be = MazeCols.GetBindingExpression(UCTextField.ValueProperty);
be.UpdateSource();
}