.Net Specify Datastore

I'm having difficulty specifying the target datastore for a conversion.  Is this the correct location to specify a target datastore?  The script is not picking it up, and it keeps defaulting to the first datastore in the list.  Is there anything else that I would need to edit to make this happen?  This is a snippit from Program.cs in the sample given.

         ConverterStorageParams converterStorageParams = new ConverterStorageParams();         converterStorageParams.cloningMode = "volumeBasedCloning";         converterStorageParams.vmxDatastoreName = _targetDatastore;

Thank you,

Craig