大家帮帮忙！我这个上传文件的方法为什么会限制文件的大小啊?文件超过一定的大小，上传就失败了！

Question

    private void PostFile(string filename)
    {
        FileStream stream = new FileInfo(filename).OpenRead();
        var shortfilename = Path.GetFileName(filename);
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://120.24.97.123/APPService.svc/UploadFile/" + OperationOrderID + "/" + shortfilename);

        request.Method = "POST";
        //request.ContentType = "application/json;charset=UTF-8";
        //request.ContentType = "application/x-www-form-urlencoded";

        request.ContentLength = stream.Length;

        Stream requestStram = request.GetRequestStream();
        int bytesread = 0;

        //从流中读取字节块并将该数据写入给定缓冲区buffer中
        Byte[] buffer = new Byte[4096];

        bytesread = stream.Read(buffer, 0, 4096);
        long UploadByte = bytesread;
        while (bytesread != 0)
        {
            if (bytesread == 4096)
            {
                requestStram.Write(buffer, 0, 4096);
            }
            else
            {
                requestStram.Write(buffer, 0, bytesread);
            }
            SetText(shortfilename + " 文件正在上传中(" + FormatFileSize(UploadByte) + "/" + FormatFileSize(stream.Length) + ")");
            bytesread = stream.Read(buffer, 0, 4096);
            UploadByte = UploadByte + bytesread;
        }

        stream.Close();
        stream.Dispose();
        requestStram.Close();
        requestStram.Dispose();


        SetText(shortfilename + " 文件上传成功...");
        Stream getStream = request.GetResponse().GetResponseStream();
        //StreamReader smd = new StreamReader(getStream);
        //SetText(smd.ReadToEnd());
        //byte[] resultByte = new byte[200];
        request.Abort();
        //getStream.Read(resultByte, 0, resultByte.Length);

        //Console.WriteLine(Encoding.UTF8.GetString(resultByte));

        //GetFiles();
    }

Answer 1

60m