private async void ShareToWeibo() { snsSharingBusy = true; string fileName = "TempShareWeibo"; var stream = await ImageHelper.SaveBitmapToLocal(bitmap, fileName, true); ////var stream = await ImageHelper.BitmapToStream(bitmap); //var buffer = await bitmap.GetPixelsAsync(); //var arr = buffer.ToArray(); //MemoryStream ms = new MemoryStream(arr); await WeiboHelper.Share(stream, shareText); snsSharingBusy = false; }