Android Question Upload a image file (jpg) on a C# WebService

Dim myJob As HttpJob                   
        myJob.Initialize("PostImage", Me)   
        myJob.PostFile(Main.sWebServiceURL & "webservice.asmx/ProfileUploader", File.DirRootExternal, "profile.jpg")

[WebMethod()]
        public string ProfileUploader()
        {
            try
            {
                string fileName = Guid.NewGuid().ToString().ToLower();

                int length = Convert.ToInt32(Context.Request.InputStream.Length);
                byte[] buffer = new byte[length];
                Context.Request.InputStream.Read(buffer, 0, length);

                MemoryStream ms = new MemoryStream(buffer);

                GenerateThumbnails(1, ms, System.Web.Hosting.HostingEnvironment.MapPath("~/ImageStorage/") + fileName);

                ms.Close();

                JavaScriptSerializer js = new JavaScriptSerializer();

                Context.Response.Expires = -1;
                Context.Response.ContentType = "application/json";

                Context.Response.Write(js.Serialize(fileName));

                try
                {
                    Context.Response.End();
                    return string.Empty;
                }
                catch (System.Threading.ThreadAbortException ex1)
                {
                    return string.Empty;
                }

            }
            catch (Exception ex)
            {
                return string.Empty;
            }
        }

Dim j As HttpJob
j.Initialize("PostImage", Me)
j.PostFile("http://" & Starter.IPAddr & "/imgupload.asmx", Dir, OrigFileName)

Dim length As Integer = Convert.ToInt32(Context.Request.InputStream.Length)
Dim buffer() As Byte = New Byte((length) - 1) {}
Context.Request.InputStream.Read(buffer, 0, length)
Dim ms As MemoryStream = New MemoryStream(buffer)

Dim file As New FileStream("test.jpg", FileMode.Create, FileAccess.Write)
ms.WriteTo(file)
file.Close()

ms.Close

Dim js As JavaScriptSerializer = New JavaScriptSerializer
Context.Response.Expires = -1
Context.Response.ContentType = "application/json"
Context.Response.Write(js.Serialize("test response"))

Context.Response.End

Dim fd As FileData
fd.Initialize
fd.Dir = Dir
fd.FileName = OrigFileName
fd.KeyName = "files"
fd.ContentType = "application/octet-stream"
files.Add(fd)
Dim NV As Map
NV.Initialize
NV.Put("note1", "abc")
Dim req As OkHttpRequest
req = MultipartPost.CreatePostRequest("http://" & Starter.IPAddr & "/imgupload.aspx", NV, files)
hc.Execute(req, 1)

Dim file As New FileStream("test.jpg", FileMode.Create, FileAccess.Write)
...
Context.Response.End

Dim file As New FileStream(Server.MapPath("test.jpg"), FileMode.Create, FileAccess.Write)
...
Context.Response.OutputStream.Close