[Proposal] Auto extend shared members and vice versa

I usually loose some time trying to use char and string methods as I forget if they are member or shared methods. I also don't know why most of the Char methods are shared not member methods. Why:
`Dim res = Char.IsLetter(c)`
not:
`Dim res = c.IsLetter`
So I am thinking, since we are familiar with extension methods, why can't VB consider each shared method an extension one if it starts with a param of the same class type?
This way the `c.IsLetter` can be lowered to `Char.IsLetter(c)`.
I also suggest the opposite (but it is less important to me): allow to use every member method to be used as a static one:
`Dim x = String.Replace(x, " ", "")`
which can be lowered to:
`Dim x = x.Replace(" ", "")`
Maybe we can make it interesting if we treat the shared form as a byRef Sub:
`String.Replace(x, " ", "")`
So, x is affected in a compact form, as it will be lowered also to:
`x = x.Replace(" ", "")`
Any way, I am interested most in the auto extension part of this suggestion.