The MC92 has a newer radio and newer Fusion drivers. Reading the EMDK for .Net 2.9 readme file. it looks to me like you would need to be using EMDK 2.7 or above to use that version of Fusion, but I would go up to the latest (2.9).
From the EMDK 2.7 release: Updated Symbol.Fusion class library with the support for Fusion X_2.00. Fusion X_2.00 supports Data/Voice Performance setting and RF Band & Channel settings.
From the EMDK 2.9 release: Updated Symbol.Fusion class library to include support for exporting and importing WLAN datastore on Fusion X_2.01 and later.
Thanks, Dan. That was indeed my issue. Before your reply, I upgraded to v2.8 and now the app works on the MC92NOG. I didn't upgrade to v2.9 because I thought v2.8 was the most up-to-date. There is a link to v2.8 on the Windows Embedded page, so I assumed it was the latest and greatest.