I'm afraid not. I've never used the wavetable synth.
To use soundfonts you would need to create your own software synthesizer. This is quite a big task. If you are interested in some of the basic principles, and you are a Pluralsight subscriber you can watch the module on mixing and effects in my NAudio course (http://pluralsight.com/training/Courses/TableOfContents/audio-programming-naudio) in which I build a very basic synthesizer.
To use soundfonts you would need to create your own software synthesizer. This is quite a big task. If you are interested in some of the basic principles, and you are a Pluralsight subscriber you can watch the module on mixing and effects in my NAudio course (http://pluralsight.com/training/Courses/TableOfContents/audio-programming-naudio) in which I build a very basic synthesizer.