Getting the converter for the type

In the MSDN I've read this about EnumConverter:

You should never create an instance of an EnumConverter. Instead, call the GetConverter method of the TypeDescriptor class. For more information, see the examples in开发者_如何学编程 the TypeConverter base class.

Does anybody know why and is it true for my own implemented converters?

For example, I have class GradientColor and converter GradientColorConverter. Should I write

new GradientColorConverter().ConvertFrom(colorString) 

or

TypeDescriptor.GetConverter(typeof(GradientColor)).ConvertFrom(colorString);

Actually It works in both ways, but which is better?

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I think the latter TypeDescriptor.GetConverter(typeof(GradientColor)) because it allows other converters to add or extend the type converter system when the code is run in a different context (like custom control run in another application with its own custom typeconverters).

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The latter. If you change the type converter class you code will still work. Decoupling is good.