Sets the prefix prepended to the datafeed files.
            
 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 SpotDatafeedSubscription WithPrefix( string prefix )
 Parameters
 Parameters- prefix (String)
- The prefix prepended to the datafeed files.
 Return Value
 Return Valuethis instance