C#检查url链接是否有效

/// <summary>
    /// 检查url链接是否有效
     /// </summary>
    /// <param name="strUri"></param>
    /// <returns></returns>
    public static bool CheckUri(string strUri)
    {
        try
        {
            System.Net.HttpWebRequest.Create(strUri).GetResponse();
            return true;
        }
        catch
        {
            return false;
        }
    }