The System.Speech namespaces contain types that support speech recognition.
|System.Speech.AudioFormat||The System.Speech.AudioFormat namespace consists of a single class, SpeechAudioFormatInfo, which contains information about the format of the audio that is being input to the speech recognition engine, or being output from the speech synthesis engine.|
|System.Speech.Recognition||The System.Speech.Recognition namespace contains Windows Desktop Speech technology types for implementing speech recognition.|
|System.Speech.Recognition.SrgsGrammar||With the members of the namespace, you can programmatically create grammars that comply with the W3C Speech Recognition Grammar Specification Version 1.0 (SRGS).|
|System.Speech.Synthesis||The N:System.Speech.Synthesis namespace contains classes for initializing and configuring a speech synthesis engine, for creating prompts, for generating speech, for responding to events, and for modifying voice characteristics.|
|System.Speech.Synthesis.TtsEngine||Supports the creation of Speech Synthesis Markup Language (SSML) based custom engines for rendering text to speech (TTS).|