[Proposal] Select Case ? pattern

I suggest to allow to composing the select case expr as a pattern using `?` like this:

```VB.NET
Dim X = "a test"
Select case X.StartsWith(?)
Case "a", "b"

Case "c"

Case Else

End Select
```

It will be lowered to:
```VB.NET
If X.StartsWith("a") OrElse X.StartsWith("b")

ElseIf X.StartsWith("c")

Else

End if
```

I also suggest to allow using members of the Select expr in the cases:
```VB.NET
Select Case X
Case "test"

Case .StartsWith("a")

Case Like "*s*"

Case .Contains("a")

Case .Substring(1, 2) = "ab"

End Select
```

the case will considered to have an embedded with applied on the case expr only not its body, and it will have effect over any outer with. The above syntax can be lowered to if statement.