Rajendra Vasant Gurjar: Two dimensional quotients of C^n are
isomorphic to C^2/\Gamma.

Abstract. We will prove that any two dimensional quotient of C^n
modulo a regular action of a reductive algebraic group is isomorphic
to a two dimensional quotient of C^2 modulo a finite group. This
answers a question of Mariusz Koras and Peter Russell affirmatively.