using System;

​

public class Program

{

    public class ServiceResponse<TContent> : ServiceResponse

    {

        public new TContent Content => (TContent)base.Content;

        internal ServiceResponse(bool code, TContent content = default (TContent)): base (code, content)

        {

        }

    }

​

    public class ServiceResponse

    {

        public bool Code

        {

            get;

            private set;

        }

​

        public object Content

        {

            get;

            private set;

        }

​

        protected ServiceResponse(bool code, object content = null)

        {

            Code = code;

            Content = content;

        }

​

        public static ServiceResponse<T> CreateSuccessful<T>(T content)

        {

            return new ServiceResponse<T>(true, content);

        }

​

        public static ServiceResponse<T> CreateUnsuccessful<T>(bool code)

        {

            return new ServiceResponse<T>(code);

        }

    }

​

    public static void Main()

    {

        Console.WriteLine(ServiceResponse.CreateSuccessful(1));

    }

}