Sets the Amazon Reference Name (ARN) of the topic whose access control policy you want to modify.
            
 Declaration Syntax
 Declaration Syntax| 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 RemovePermissionRequest WithTopicArn( string topicArn )
 Parameters
 Parameters- topicArn (String)
- The Amazon Reference Name (ARN) of a topic .
 Return Value
 Return Valuethis instance