Sets the ARN of the topic you want to publish to.

C# |
[ObsoleteAttribute("The With methods are obsolete and will be removed in version 2 of the AWS SDK for .NET. See http://aws.amazon.com/sdkfornet/#version2 for more information.")] public PublishRequest WithTopicArn( string topicArn )

- topicArn (String)
- The topic you want to publish to.

this instance