private static void WriteMultipartFormData(Stream stream, string boundary, KeyValuePair<string, object>[] prm)
{
var items = prm.ConvertAll(x => MultipartItem.Create(x.Key, x.Value));
// Start writing
foreach(var x in items)
{
stream.WriteString("--" + boundary + "\r\n");
x.WriteTo(stream);
stream.WriteString("\r\n");
}
stream.WriteString("--" + boundary + "--");
}