httppostdfilebase文件，因为它正在被另一个进程使用

我使用了一个使用文件上传器的控制器动作，我想压缩图像并在保存图像后执行压缩过程，所以我的问题是:我想只保存压缩图像并删除原始图像。文件，因为它正在被另一个进程

使用

My Code is:

  public ActionResult submitgeneralinfo(HttpPostedFileBase file, int? EmployeeId, GeneralInfoViewModel model)
    {
           var ext = Path.GetExtension(file.FileName);
           uniquefilename = Convert.ToString(ID) + ext;
           var path = Path.Combine(Server.MapPath("~/Attachements/GeneralInfodp/"), uniquefilename);
           var compaths = Path.Combine(Server.MapPath("~/Attachements/GeneralInfodp/"), "com" + uniquefilename);
           file.SaveAs(path);
           file.InputStream.Dispose();
           CompressImage(Image.FromFile(path), 30, compaths);
           file.InputStream.Close();
                    file.InputStream.Dispose();
                    GC.Collect();
                    FileInfo file3 = new FileInfo(path);
                    if (file3.Exists)
                    {
                        file3.Delete(); // error :- file because it is being used by another process
                    }
    } 

    private void CompressImage(Image sourceImage, int imageQuality, string savePath)
    {
        try
        {
            //Create an ImageCodecInfo-object for the codec information
            ImageCodecInfo jpegCodec = null;
            //Set quality factor for compression
            EncoderParameter imageQualitysParameter = new EncoderParameter(
                        System.Drawing.Imaging.Encoder.Quality, imageQuality);
            //List all avaible codecs (system wide)
            ImageCodecInfo[] alleCodecs = ImageCodecInfo.GetImageEncoders();
            EncoderParameters codecParameter = new EncoderParameters(1);
            codecParameter.Param[0] = imageQualitysParameter;
            //Find and choose JPEG codec
            for (int i = 0; i < alleCodecs.Length; i++)
            {
                if (alleCodecs[i].MimeType == "image/jpeg")
                {
                    jpegCodec = alleCodecs[i];
                    break;
                }
            }
            //Save compressed image
            sourceImage.Save(savePath, jpegCodec, codecParameter);
        }
        catch (Exception e)
        {
        }
    }

[HttpPost]
public ActionResult Index(HttpPostedFileBase file)
{
    WebImage img = new WebImage(file.InputStream);
    if (img.Width > 1000)
        img.Resize(1000, 1000);
    img.Save("path");
    return View();
}