public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
object result;
if (DefaultConverter.TryConvertTo(value, targetType, culture, m_converter, out result))
{
return(result);
}
if (value != null)
{
var valueType = value.GetType();
if (DefaultConverter.TryConvertTo(value, targetType, culture, TypeDescriptor.GetConverter(valueType), out result))
{
return(result);
}
if (targetType.IsAssignableFrom(valueType))
{
return(value);
}
}
else if (DefaultConverter.IsNullableType(targetType))
{
return(value);
}
throw new ArgumentException("Cannot convert to type " + targetType.FullName + ".", "value");
}