using System;

using System.Threading.Tasks;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var enumerable = Test().Result;

        Console.WriteLine(enumerable);

    }

    private async static Task<IEnumerable<MyClass>> Test()

    {

        return (IEnumerable<MyClass>)new MyClass[0];

    }

}

​

public class MyClass {}