// using System.Speech.Synthesis;

                SpeechSynthesizer synth = new SpeechSynthesizer();

                // Configure the audio output.

                synth.SetOutputToDefaultAudioDevice();

                synth.Speak("请说一句话");

                synth.Speak("Speak English,please");

                // Speak a string.

                synth.Speak("This example demonstrates a basic use of Speech Synthesizer");

                Console.WriteLine();

                Console.WriteLine("Press any key to exit...");

                Console.ReadKey();

                return ;