/// <summary>
/// Converts the given value object to the specified type, using the specified context and culture information.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="culture">A <see cref="T:System.Globalization.CultureInfo"></see>. If null is passed, the current culture is assumed.</param>
/// <param name="value">The <see cref="T:System.Object"></see> to convert.</param>
/// <param name="destinationType">The <see cref="T:System.Type"></see> to convert the value parameter to.</param>
/// <returns>An <see cref="System.Object"></see> that represents the converted value.</returns>
/// <exception cref="System.ArgumentNullException">destinationType</exception>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException(nameof(destinationType));
}
if (destinationType == UnderlyingType && NameableType.IsInstanceOfType(value))
{
return(value);
}
if (destinationType == typeof(InstanceDescriptor))
{
return(new InstanceDescriptor(NameableType.GetConstructor(new[] { UnderlyingType }), new[] { value }, true));
}
if (value == null)
{
if (destinationType == typeof(string))
{
return(string.Empty);
}
}
else if (UnderlyingTypeConverter != null)
{
return(UnderlyingTypeConverter.ConvertTo(context, culture, value, destinationType));
}
return(base.ConvertTo(context, culture, value, destinationType));
}
