public class Endpoint

{

}

​

public class Child1 : Endpoint

{

    public const string URL = "http://example.com";

    public const Method Method = Method.Post;   

}

​

//Versus

public abstract class Endpoint

{

    public abstract string Endpoint;

    public abstract Method Method;

}

​

public class Child1 : Endpoint

{

    protected override string UrlTemplate => "http://www.example.com";

    protected override Method Method => Method.Post;

}