Error:

Unhanded "System.Runtime.InteropServices.COMException" Error in demo_vs2005_csharp.exe

Other information: COM object with CLSID '{4B99A236-AD7C-4059-B88E-D2B77C5CD8CC}' cannot be created due to the following error: Class not registered .

Reason:

ttsapi.dll COM do not registered on device or Emulator.

Resolve:

Upload TTS Engine CAB to device or Emulator,double click to install, or register ttsapi.dll, ttseng.dll COM manually