[Proposal] Generic aliases

[VBAndCs]

Allow defining generic aliases:
Currently, we can't mark an alias as generic:

using Expr<T> = Expression<Func<T, object>>;

So, Expr can be used in generic classes like this:

class Foo<T>
{
   public List<Expr<T>> Includes { get; } 
       = new List<Expr<T>>( );
}

Which is a little longer than #3306 but still readable, with the benefit that it is usable in all classes in the file.

[YairHalberstadt]

@VBAndCs

For future reference, adding a link to your issue on every single related issue is generally considered spam.

[YairHalberstadt]

Also this is a duplicate of #1239.
Please close and move discussion to there.

[CyrusNajmabadi]

Dupe. Closing out.

[CyrusNajmabadi]

For future reference, adding a link to your issue on every single related issue is generally considered spam.

Indeed. Please avoid that in the future @VBAndCs. Thanks!

[VBAndCs]

OK.
Hope you accept #1239.