GCD Simplified using lambda

Here is a trick which simplifies GCD using Lambda expression:

Func<int,int,int> GCDrecussion = null;
              GCDrecussion = (z,x) => x == 0 ? z : GCDrecussion(x, z % x);
             Console.WriteLine(GCDrecussion(4, 6));

The Function GCDrecussion takes 2 parameters; both are of int type, in my case I have passed 4 and 6 and the function returns int.