using System;

using Moq;

public class Program

{

    public static void Main()

    {

        int refInt = 3;

        double refDbl = 6.0;

        Mock<IResponder> responder = new Mock<IResponder>();

        responder.Setup(

            item => item.Request(

                It.IsAny<string>(), ref refInt, ref refDbl

            )

        ).Returns(true);

        var (res, integer, dbl) = responder.Object.Extension("name1");

        Console.WriteLine($"{res}: {integer} {dbl}");

    }

}

​

public interface IResponder {

    bool Request(string Name, ref int value1, ref double value2);

}

​

public static class ResponderExt{

    public static (bool, int, double) Extension(this IResponder responder, string name)

    {

        int integer = default;

        double dbl = default;

        //var res = responder.Request(name, ref integer, ref dbl);

        //return (res, integer, dbl);

        return responder.Extension(name, ref integer, ref dbl);

    }

    public static (bool, int, double) Extension(this IResponder responder, string name, ref int integer, ref double dbl)

    {

        var res = responder.Request(name, ref integer, ref dbl);

        return (res, integer, dbl);

    }

}