/// <summary>
/// 保存远程文件到本地
/// </summary>
/// <param name="url">远程文件URL</param>
/// <param name="file">保存的本地路径</param>
/// <returns></returns>
public bool DownloadFile(string url, string file)
{
    try
    {
        (new System.Net.WebClient()).DownloadFile(url,file);
        return true;
    }
    catch { }

    return false;
}