禁止缓存文件 asp.net(C#)禁止缓存文件不让文件缓存到客户端

Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Cache.SetExpires(DateTime.Now.AddDays(-1));
Response.Expires = 0;
Response.CacheControl = "no-cache";