How to invoke static method in C#4.0 with dynamic type?

Question

In C#4.0, we have dynamic type, but how to invoke static method of dynamic type object?

Below code will generate exception at run time. The dynamic

Answer 1

One possible workaround would be to use reflection.

dynamic d = new Foo();

var sum = (int)d.GetType()
                .GetMethod("Sum")
                .Invoke(d, new object[] { 1, 3 });
Console.WriteLine(sum);