public UI.Size Measure(UI.Size constraints)
{
double width = passwordBox.Width;
double height = passwordBox.Height;
passwordBox.Width = double.NaN;
passwordBox.Height = double.NaN;
passwordBox.Measure(new System.Windows.Size(constraints.Width, constraints.Height));
passwordBox.Width = width;
passwordBox.Height = height;
return(new UI.Size(passwordBox.DesiredSize.Width, passwordBox.DesiredSize.Height));
}