将自定义缩略图上传到Sharepoint图像库

 using (SPSite objSite = new SPSite("http://foo.com/"))
        {
            using (SPWeb objWeb = objSite.OpenWeb())
            {
                //Need to abstract this library definition...
                SPFolder mylibrary = objWeb.Folders["Media/_t"];
                // Set AllowUnsafeUpdates = true to avoid security error
                objWeb.AllowUnsafeUpdates = true;
                mylibrary.Files.Add(System.IO.Path.GetFileName(filename), bytes);
            }
        }