C#中IList 与 List 的区别小结

using System;
using System.Collections.Generic;
namespace DemoApplication{
   class Demo{
      static void Main(string[] args){
         IList<string> ilist = new IList<string>();
         //This will throw error as we cannot create instance for an IList as it is an interface.
         ilist.Add("Mark");
         ilist.Add("John");
         foreach (string list in ilist){
            Console.WriteLine(list);
         }
      }
   }
}

using System;
using System.Collections.Generic;
namespace DemoApplication{
   class Demo{
      static void Main(string[] args){
         IList<string> ilist = new List<string>();
         ilist.Add("Mark");
         ilist.Add("John");
         List<string> list = new List<string>();
         ilist.Add("Mark");
         ilist.Add("John");
         foreach (string lst in ilist){
            Console.WriteLine(lst);
         }
         foreach (string lst in list){
            Console.WriteLine(lst);
         }
         Console.ReadLine();
      }
   }
}

/// <summary>
/// List转IList公共方法
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="listObjects"></param>
/// <returns></returns>
protected static IList<T> ConvertToGenericList<T>(IList listObjects)
{
      IList<T> convertedList = new List<T>(listObjects.Count);
 
      foreach (object listObject in listObjects)
      {
           convertedList.Add((T)listObject);
      }
 
      return convertedList;
}