S>public class Request<K>
S>{
S>    public K Id;
S>}

S>public class Response<T>
S>{
S>    public T Data;
S>}

S>public class MyDto
S>{
S>}


S>public abstract class BaseStorage
S>{
S>    public virtual Response<T> GetDemo<T, K>(Request<K> request)
S>    {
S>    }
S>}


S>public class ChildStorage : BaseStorage
S>{
S>    public override Response<MyDto> GetDemo<MyDto, int>(Request<int> request)
S>    {
S>        return new Response<MyDto>();
S>    }
S>}

S>