public static async Task <HttpResponseMessage> Upload( string bearerToken, string requestUri, FileStreamResult file, bool longTimeout = false) { var builder = new HttpRequestBuilder() .AddMethod(new HttpMethod("POST")) .AddBearerToken(bearerToken) .AddRequestUri(requestUri); if (longTimeout) { builder.AddTimeout(new System.TimeSpan(TicksPerSecond * 300)); } byte[] data; using (var br = new BinaryReader(file.FileStream)) data = br.ReadBytes((int)file.FileStream.Length); ByteArrayContent bytes = new ByteArrayContent(data); MultipartFormDataContent multiContent = new MultipartFormDataContent(); //multiContent.Add(bytes, file.FileDownloadName, file.FileDownloadName); multiContent.Add(bytes, "file", file.FileDownloadName); builder.AddContent(multiContent); return(await builder.SendAsync()); }