local variable naming convention

[Boyd]

I'm in the process of adapting my library to the D standard 
naming convention.

The problem is that I used to separate member variables and local 
variables through capitalization.

X would be a member variable.
x would be a local variable.

this allowed me, among other things, to create constructors such 
as:

this(int x, int y)
{
    X = x;
    Y = y;
}

So now my question is, how do you distinguish between member and 
local vars in such cases?

Cheers,
Boyd