合并两个数组为一个新的数组，两数组中相同的数据只存在一个

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;

public partial class _Default : System.Web.UI.Page    
{
void Page_Load() void Page_Load(object sender, EventArgs e)
        {
                 string str1 = "100,101,102,103,104,105,106";
                 string str2 = "100,101,102,103,104";
                 string[] temp1= str1.Split( ',');
                 string[] temp2= str2.Split( ',');

                 string[] temp3= MergeArray(temp1, temp2);

                 for (int i = 0; i < temp3.Length; i++)
                {
                        Response.Write( temp3[i]+ "
");
                }

        }

 private  string [] MergeArray( string [] a, string [] b)
        {

                ArrayList array= new ArrayList();
                foreach ( string s1 in a)
                {
                         array.Add(s1);
                }
                foreach ( string s2 in b)
                {
                        bool flag = true;
                         for (int i = 0; i < a.Length; i++)
                        {    
                                 if(a[i]==s2)
                                {
                                        flag = false;
                                        break;
                                }
                        }
                         if (flag)
                        {
                                student.Add(s2);
                        }
                }
                 string[] c1= ( string[])student.ToArray(typeof( string));


                return c1;
        }


}