using System;
using System.Collections;
 
public class ArrayIsFixedSize
{ 
 
   public static void Main() 
   { 
      string[] strings = {"C#", ".NET"};
      ListPropery (strings);
   } 
    
   public static void ListPropery (IList iList) 
   { 
      Console.WriteLine 
         ("IsFixedSize = {0}", iList.IsFixedSize);
   } 
}

Output:
IsFixedSize = True