With #6469 in, we now give nice suggestions for the following

class C {
    static foo: string;

    static bar() {
        let k = foo;
    }
}

where we will report "Did you mean the static member 'C.foo'?".

A small snag is that it won't give you suggestions for a static member from an instance method.

class C {
    static foo: string;

    bar() {
        let k = foo;
    }
}

You'll just get "Cannot find name 'foo'." We should change this.

Note that the following should have no suggestions:

class C {
    foo: string;

    static bar() {
        let k = foo;
    }
}