private async Task ShareToWeixinAsync(string name) { shareType = name == "WeixinShare" ? ShareType.WechatSession : ShareType.WechatTimeLine; var doc = new HtmlDocument(); doc.LoadHtml(nativeString); var bytes = await SDKHelpers.ReadResFromImageAsync(thumb); await SDKHelpers.SendWechatShareToUserChoiceRequestAsync( url : currentUri.ToString(), title : title, thumb : bytes, desc : description, toTimeLine : shareType); }