1 // CS0453: The type `B.M' must be a non-nullable value type in order to use it as type parameter `T' in the generic type or method `Foo.Test_2<T>(this T)'
3 // Compiler options: -langversion:linq
7 public static class Foo
9 public static string Test_2<T> (this T s) where T : struct
19 public static void Main ()