/// <summary>
/// Post the data as a multipart form
/// postParameters with a value of type byte[] will be passed in the form as a file, and value of type string will be
/// passed as a name/value pair.
/// </summary>
public static HttpWebResponse MultipartFormDataPost(string postUrl, string userAgent, Dictionary <string, object> postParameters)
{
string formDataBoundary = "-----------------------------28947758029299";
string contentType = "multipart/form-data; boundary=" + formDataBoundary;
byte[] formData = WebHelpers.GetMultipartFormData(postParameters, formDataBoundary);
return(WebHelpers.PostForm(postUrl, userAgent, contentType, formData));
}