public async Task <List <ImportParameters> > UploadFilesToStorageAccountAndGnerateParameters() { List <ImportParameters> returnValue = new List <ImportParameters>(); MultipartMemoryStreamProvider inputStreams = await requestInput.Content.ReadAsMultipartAsync(); Dictionary <string, byte[]> fileData = inputStreams.ExtractStreams(); var nvc = requestInput.RequestUri.ParseQueryString(); string halbJahrParam = nvc["Halbjahr"]?.ToString(); halbJahrParam = System.Web.HttpUtility.UrlDecode(halbJahrParam); string constring = Environment.GetEnvironmentVariable(ConnectionString); BlobServiceClient blobServiceClient = new BlobServiceClient(constring); BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("imports"); string instanceId = string.Empty; foreach (KeyValuePair <string, byte[]> kvp in fileData) { ImportParameters parameter = new ImportParameters(); parameter.FileName = string.Concat(kvp.Key, "_", Guid.NewGuid().ToString("N")); parameter.HalfYearSetting = halbJahrParam; BlobClient blob = containerClient.GetBlobClient(parameter.FileName); blob.Upload(new MemoryStream(kvp.Value)); returnValue.Add(parameter); } return(returnValue); }