how I can change the voice synthesizer gender and age in C#?

I would like to change the gender and age of the voice of System.Speech in c#. For example, a girl of 10 years but can not find any simple example to help me adjust the parameters.

First, check which voices you have installed by enumerating the GetInstalledVoices method of the SpeechSynthesizer class, and then use SelectVoiceByHints to select one of them:

using (SpeechSynthesizer synthesizer = new SpeechSynthesizer())
{
    // show installed voices
    foreach (var v in synthesizer.GetInstalledVoices().Select(v => v.VoiceInfo))
    {
        Console.WriteLine("Name:{0}, Gender:{1}, Age:{2}",
          v.Description, v.Gender, v.Age);
    }

    // select male senior (if it exists)
    synthesizer.SelectVoiceByHints(VoiceGender.Male, VoiceAge.Senior);

    // select audio device
    synthesizer.SetOutputToDefaultAudioDevice();

    // build and speak a prompt
    PromptBuilder builder = new PromptBuilder();
    builder.AppendText("Found this on Stack Overflow.");
    synthesizer.Speak(builder);
}

http://msdn.microsoft.com/en-us/library/system.speech.synthesis.voiceage.aspx http://msdn.microsoft.com/en-us/library/system.speech.synthesis.voicegender.aspx

Did you take a look at this ?