public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value == null)
{
return(DependencyProperty.UnsetValue);
}
var s = value.ToString();
if (s == null)
{
return(DependencyProperty.UnsetValue);
}
if (s.ToUpper() == True.ToUpper())
{
return(true);
}
if (s.ToUpper() == False.ToUpper())
{
return(false);
}
return(DependencyProperty.UnsetValue);
}