我正在编写代码将文件上传到AWSS3并接收此例外：AmazonClientException：未配置regionEndpoint或Serviceurl我的代码：Console.WriteLine("readytoupload");AWSCredentialscredentials;credentials=newBasicAWSCredentials(accessKeyID.Trim(),secretKey.Trim());AmazonS3Clients3Client=newAmazonS3Client(accessKeyID.Trim(),secretKey.Trim(),Amazon.Reg