using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var x = new MyClass();

        x.Get().Any();

        foreach (var z in x.Get())

        {

​

        }

    }

    class MyClass

    {

        public IEnumerable<string> Get()

        {

            A();

            yield return "X";

            B();

        }

        void A()

        {

            Console.WriteLine("A");

        }

        void B()

        {

            Console.WriteLine("B");

        }

    }

}