ArrayListHelper

 1  public static class ArrayListHelper
 2     {
 3         /// <summary>
 4         /// determine whether the array list contain the sepcific string
 5         /// </summary>
 6         /// <param name="source"></param>
 7         /// <param name="obj"></param>
 8         /// <returns></returns>
 9         public static bool ContainsRegardlessCase(this ArrayList source, string obj)
10         {
11             for (int i = 0; i < source.Count; i++)
12             {
13                 string str = source[i].ToString();
14                 if (str.ToUpper() == obj.ToUpper())
15                 {
16                     return true;
17                 }
18             }
19             return false;
20         }
21     }