1 // CS0266: Cannot implicitly convert type `System.Collections.Generic.IEnumerable<T>' to `System.Collections.Generic.IEnumerable<U>'. An explicit conversion exists (are you missing a cast?)
5 using System.Collections.Generic;
9 static void Bla<T, U> () where T : U
11 IEnumerable<T> ita = null;
12 IEnumerable<U> itu = ita;