How to use the Speech Synthesizer in WPF

Microsoft provides a new speech API (SAPI) for Windows Vista and later. It allows developers to build speech enabled applications. Simply add a reference to System.Speech and include the following code to your project.

 
using System.Speech.Synthesis;
 
SpeechSynthesizer synthesizer = new SpeechSynthesizer(); 
synthesizer.Volume = 50;  // 0...100
synthesizer.Rate = 3;     // -10...10
 
// Synchronous
synthesizer.Speak("Welcome to the WPF Tutorial.");
 
// Asynchronous
synthesizer.SpeakAsync("Welcome to the WPF Tutorial.");