Question

I have some curly question..
I can define alias for the class at top of my document, Such as

using MyName = Bla.Bla.ClassName

But can I define something like this in the method?

Answer 1

No, you can’t. If you mean that you want to define
a class alias inside a method, this is not possible.

Alias could be defined only at file or namespace level:

using MyName = Bla.Bla.ClassName;
namespace A{
...
}

or

namespace A{
    using MyName = Bla.Bla.ClassName
...
}

If you instead mean you want to define a “method alias”, this also isn’t possible: alias are only for types or namespaces.