用C#替换类实现

public interface IReplaceable
{
    void Replace();
}

public class ReplaceableClass : IReplaceable
{
    public void Replace()
    {
        Console.WriteLine("ReplaceableClass的Replace方法被调用");
    }
}

public class NewReplaceableClass : IReplaceable
{
    public void Replace()
    {
        Console.WriteLine("NewReplaceableClass的Replace方法被调用");
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        IReplaceable replaceable = new ReplaceableClass();
        replaceable.Replace();

        replaceable = new NewReplaceableClass();
        replaceable.Replace();
    }
}

ReplaceableClass的Replace方法被调用
NewReplaceableClass的Replace方法被调用