请教一下各位先进：
　　我需要将server上的文件整批汇出一个压缩档给user操作使用，整批实体文件大小约1.5G以下，整批汇出时遇到已发生类型 'System.OutOfMemoryException' 的例外状况，查看server的内存状况，落在12GB以上，server共有16G内存可用，将server重开后，占用内存约8.5GB，执行整批汇出功能测试内存并没有往上冲至12G，最高大约落在9.5GB，程式依然报System.OutOfMemoryException，初步判断不是server 内存不够问题。
想请问这样的压缩档整批汇出功能，有文件大小的限制吗？可以突破文件大小的限制吗？
先谢谢了～

public ActionResult ExportPapersZip(PaperViewModel PV)
{
    var ms = new MemoryStream();
    FileStream sFile;
    string FileName = "";
    byte[] toBytes;
    List<ConferencePaperFilesViewModel> cpfVM = new List<ConferencePaperFilesViewModel>();
    cpfVM = fileSrv.GetConferencePaperFilesList(PV.ConferenceId, 5);
    using (var archive = new System.IO.Compression.ZipArchive(ms, ZipArchiveMode.Create, true))
    {
        cpfVM.ForEach(x =>
        {
            try
            {
                string MemberName = memberSrv.GetMemberName(x.MemberId);
                string TrackName = conferenceSrv.GetTrackTitle(x.TrackId);
                string SubFileName = Path.GetExtension(x.OriginalFileName).ToLower();
                sFile = new FileStream(x.SysPath + x.OriginalFileName, FileMode.Open, FileAccess.Read);
                toBytes = fileSrv.BinaryReadToEnd(sFile);
                if(x.CleanTitle == null)
                {
                    FileName = x.paperId.ToString();
                }
                else
                {
                    FileName = x.CleanTitle;
                }
                var zipEntry = archive.CreateEntry(FileName + "_F" + SubFileName, System.IO.Compression.CompressionLevel.Fastest);
                using (var zipStream = zipEntry.Open())
                {
                    zipStream.Write(toBytes, 0, toBytes.Length);
                }
            }
            catch (Exception)
            {
                throw;
            }
        });
    }//end using (var archive = new System.IO.Compression.ZipArchive(ms, ZipArchiveMode.Create, true))
    return File(ms.ToArray(), "application/zip", "Files.zip");
}