connecting to informix

I am trying to connect to Informix using an existing application with a field for a connection string. Using the ODBC driver works great, however I would like to use the .NET driver for performance reasons. Is there a way to specify the string use that driver instead of the current example: Driver={IBM INFORMIX ODBC DRIVER};Server=svr_custom;Database=test;Uid=username;Pwd=password I would like to make it use the .NET driver instead. Any suggestions? This is an application that listens to messages from a socket message handler and then processes them for use in the database.