我是異步編程的新手，正在嘗試將 2 個文件并行上傳到 rest api。每個文件的上傳過程包括 3 個 rest 調用 1. 初始放置：創建文件 2. 使用補丁追加數據 3. 保存/刷新文件中的數據以提交它。所有這些都是按順序進行的，但是當我嘗試異步執行時，我會隨機失敗，因為異步方法的參數會被其他任務覆蓋。我一直在關注這里的指南：https ://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/并嘗試遵循類似的策略     private async Task<string> UploadFiles(string year, string month, string filename, string accesstoken, string path)        {            //Initial Put : corresponding to point 1 above in the summary            var method = new HttpMethod("PUT");            url = String.Format("https://someurl/part1/{0}/{1}/{2}?resource=file&recursive=True", year, month, localfilename);            var request = new HttpRequestMessage(method, url)            {                Content = null            };            request.Headers.Add("Authorization", "Bearer " + accesstoken);            var initput = await client.SendAsync(request);            //Append Data :corresponding to point 2 above in the summary            url = String.Format("https://someurl/part1/{0}/{1}/{2}?action=append&position=0", year, month, localfilename);            ****Here some code for file details which isn't necessary for this question***            method = new HttpMethod("PATCH");            request = new HttpRequestMessage(method, url)            {                Content = content            };            request.Headers.Add("Authorization", "Bearer " + accesstoken);            var response = await client.SendAsync(request);            long? position = request.Content.Headers.ContentLength;            //Flush Data:corresponding to point 3 above in the summary            url = String.Format("someurl/part1/{0}/{1}/{2}?action=flush&position={3}", year, month, localfilename, position.ToString());            request = new HttpRequestMessage(method, url)            {                Content = null            };        }