SpeechRecognitionEngine.UpdateRecognizerSetting Method (String, String)
Updates the specified speech recognition engine setting with the specified string value.
Assembly: System.Speech (in System.Speech.dll)
With the exception of PersistedBackgroundAdaptation, property values set using the UpdateRecognizerSetting method remain in effect only for the current instance of SpeechRecognitionEngine, after which they revert to their default settings. See UpdateRecognizerSetting for descriptions of supported settings.