Basic function to handle file uploads using xamarin.mac

UploadNative.cs

//Upload function using the native functionality of Mac
public static string UploadNative (string url, byte [] paramFileBytes, string fileFormName, Dictionary<string, string> args)
{
	NSData actualFile = NSData.FromArray (paramFileBytes);
	NSString urlString = (NSString)url;
	//we're gonna send byte data
	NSMutableUrlRequest request = new NSMutableUrlRequest ();
	request.Url = new NSUrl(urlString);
	request.HttpMethod = "POST";
	string boundary = "---------------------------14737809831466499882746641449";
	NSString contentType = new NSString (string.Format("multipart/form-data; boundary={0}", boundary));
	var keys = new object [] { "Content-Type" };
	var objects = new object [] { contentType };
	var dictionary = NSDictionary.FromObjectsAndKeys (objects, keys);
	request.Headers = dictionary;
	NSMutableData body = new NSMutableData ();
	body.AppendData (NSData.FromString(new NSString(string.Format("\r\n--{0}\r\n", boundary))));
	body.AppendData (NSData.FromString(new NSString(string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{0}.png\"\r\n", fileFormName))));
	body.AppendData (NSData.FromString (new NSString ("Content-Type: application/octet-stream\r\n\r\n")));
	body.AppendData (actualFile);
	body.AppendData (NSData.FromString(new NSString(string.Format("\r\n--{0}--\r\n", boundary))));
	foreach (KeyValuePair<string, string> kvp in args) {
		body.AppendData (NSData.FromString (new NSString (string.Format ("\r\n--{0}\r\n", boundary))));
		body.AppendData (NSData.FromString (new NSString (string.Format ("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n", kvp.Key))));
		body.AppendData (NSData.FromString (new NSString(kvp.Value)));
		body.AppendData (NSData.FromString (new NSString (string.Format ("\r\n--{0}--\r\n", boundary))));
	}
	request.Body = body;
	NSUrlResponse resp;
	NSError err;
	NSData returnData = NSUrlConnection.SendSynchronousRequest (request, out resp, out err);
	return NSString.FromData (returnData, NSStringEncoding.UTF8).ToString();
}