Sets the SnsTopicArn property
            
 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 EventSubscription WithSnsTopicArn( string snsTopicArn )
 Parameters
 Parameters- snsTopicArn (String)
- The value to set for the SnsTopicArn property
 Return Value
 Return Valuethis instance