ASP .NET下的301重定向如何做

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Web.UI; 
using System.Web.UI.HtmlControls; 
namespace ClassLib 
{ 
public class URLClass 
{ 
private bool flag301 = false;//是否启动 301 
private bool isIndex = false;//是否 返回主页 或者保留在当前页 
/// <summary> 
/// 构造函数 
/// </summary> 
/// <param name="fl">是否启动 301</param> 
/// <param name="page">Page</param> 
/// <param name="strURL">格式www.eqidi.com</param> 
public URLClass(bool fl, Page page, string strURL) 
{ 
flag301 = fl; 
URL301(page, strURL); 
} 
/// <summary> 
/// 返回主页 
/// </summary> 
/// <param name="page"></param> 
/// <param name="strURL">格式www.eqidi.com</param> 
public void URL301(Page page, string strURL) 
{ 
//301重定向 
if (page.Request.Url.DnsSafeHost != strURL && flag301 == true) 
{ 
page.Response.Clear(); 
page.Response.StatusCode = 301; 
page.Response.Status = "301 MovedPermanently"; 
page.Response.AddHeader("Location", "http://" + strURL); 
page.Response.End(); 
} 
} 
} 
}