'partial' keyword in C# is very good for project , what's the same thing in D?

[FrankLike via Digitalmars-d]

> No human uses partial classes in .NET land other than the tools 
> themselves.
>
> It is a language feature introduced to simplify how Visual 
> Studio supports round-trip editing of UI code in its designers, 
> instead of relying in metadata files.
>
> --
> Paulo

Very good,It makes your code look very simple ， nice and cool.

Frank