相关疑难解决方法(0)

我使用以下代码使myClass使用foreach.但我对编程很新,并且在理解下面的代码时遇到了一些困难.我在评论中描述了我的问题.我很感激提供一些信息.

    public class MyClass : IEnumerable<string> 
    {  
    //1) What is IEnumerator for?
        // Whats the difference between IEnumerator and IEnumerable
    public IEnumerator<string> GetEnumerator()     
    {
             yield return "first";         
             yield return "second";     
    }      
    //2) What is it for?  It just calls above method 
   IEnumerator IEnumerable.GetEnumerator()
         {
             return GetEnumerator(); 
         } 
    }
   //3) Lastly what benefits I have from implementing genetic interface 
   //IEnumerable<string> instead of just IEnumerable