/// <summary>
/// 复制单个文件
/// </summary>
/// <param name="frompath">源地址</param>
/// <param name="topath">目标地址</param>
public static void CopyFile(string frompath, string topath)
{
FileWork.CopyFile(frompath, topath);
}
/// <summary>
/// 更新本地版本号|和下载路径便于以后的下载路径发生变化
/// </summary>
public static void UpdateLocalXml()
{
document.DocumentElement.ChildNodes[0].Attributes["no"].Value = FileWork.GetDownVersion();
document.DocumentElement.ChildNodes[1].Attributes["url"].Value = FileWork.GetDownUrl();
document.Save(GetDictiory() + "\\LocalVersion.xml");
}