It has nothing to do with the question per se, but I guess I'd rather state my reason for wanting to.
I'm not developing an API to be consumed by a lot of other .NET languages or anything like that, but it's rather a matter of style and readability.
I don't like how the C# aliases are 1. colored in VS like reserved words instead of types, and 2. lower-cased unlike any other type, external or made by me.