c# - design of generic version of interface with its non generic verion

最新推荐文章于 2025-02-14 14:52:23 发布

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本文探讨了如何设计能够同时处理通用类和非通用类的接口，通过具体示例展示了如何实现 `IEnumerable` 接口的泛型和非泛型版本，并提供了实现这些接口类的骨架。

sometimes you may want to design some interfaces so that it can handle both generic classes and the non-generic classes. The reason for oding this is 1. for backward compatability 2. you may deal with data with determined parameter type T or data whose type is object.

A typical example of this is the IEnumerable interface, where

public interface IEnumerable
{
    IEnumerator GetEnumerator();
}


 
public interface IEnumerable<out T> : IEnumerable
{
    IEnumerator<T> GetEnumerator();
}

Below I provided the skeleton to implements such classes that inherits from the generic/non-generic interfaces.

  interface IInterface
  {
    object Object { get; } 
  }

  interface IInterface<T> : IInterface
  {
    T Object { get; } 
  }

  class NonGeneric : IInterface
  {
    protected object obj;

    public object Object { 
      get { return obj; } 
    } 
  }

  class Generic<T> : NonGeneric, IInterface<T>, IInterface
  {
    object IInterface.Object { get { return base.obj; } }

    public T Object { get { return (T)base.obj; } }

  }