Sets the key under which the Amazon S3 object is stored and returns
this object instance, enabling additional method calls to be chained together.

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 TransferUtilityDownloadRequest WithKey( string key )

- key (String)
- The key under which the Amazon S3 object is stored.

This object instance, enabling additional method calls to be chained together.