static async Task SNSAsync()
{
var topicArn = ConfigurationManager.AppSettings["DemoTopicArn"];
var snsClient = new AmazonSimpleNotificationServiceClient(ConfigurationManager.AppSettings["AccessId"], ConfigurationManager.AppSettings["SecretKey"], RegionEndpoint.USEast1);
var publisher = new SNSPublisher();
PublishResponse response = await publisher.SendMessage(snsClient, topicArn, "MESSAGE");
Console.WriteLine(response.MessageId);
MessageAttributes messageAttributes = new MessageAttributes();
messageAttributes.Add("provider_type", "LOA");
response = await publisher.SendMessage(snsClient, topicArn, "MESSAGE WITH MATCHING ATTRIBUTES", messageAttributes);
Console.WriteLine(response.MessageId);
messageAttributes.Add("provider_type", "MR");
response = await publisher.SendMessage(snsClient, topicArn, "MESSAGE WITH NON-MATCHING ATTRIBUTES", messageAttributes);
Console.WriteLine(response.MessageId);
}