code to use windows default voice in talkback code

Hi,

SpeechSynthesizer speechSynthesizer = new SpeechSynthesizer();
// Use the default voice.
speechSynthesizer.SelectVoiceByHints(VoiceGender.Female);
//You can also use other VoiceGender like Male,
//Neutral or set the voice using specific name
speechSynthesizer.SelectVoice("Microsoft David Desktop");
// Set the volume
speechSynthesizer.Volume = 100;
// Speak a string.
speechSynthesizer.SpeakAsync("Hello World");

Hi!

Get SelectedVoiscesInstalled first:

using System;  
using System.Speech.Synthesis;  
using System.Speech.AudioFormat;  

namespace SampleSynthesis  
{  
  class Program  
  {  
    static void Main(string[] args)  
    {  

      // Initialize a new instance of the SpeechSynthesizer.  
      using (SpeechSynthesizer synth = new SpeechSynthesizer())  
      {  

        // Output information about all of the installed voices.   
        Console.WriteLine("Installed voices -");  
        foreach (InstalledVoice voice in synth.GetInstalledVoices())  
        {  
          VoiceInfo info = voice.VoiceInfo;  
          string AudioFormats = "";  
          foreach (SpeechAudioFormatInfo fmt in info.SupportedAudioFormats)  
          {  
            AudioFormats += String.Format("{0}\n",  
            fmt.EncodingFormat.ToString());  
          }  

          Console.WriteLine(" Name:          " + info.Name);  
          Console.WriteLine(" Culture:       " + info.Culture);  
          Console.WriteLine(" Age:           " + info.Age);  
          Console.WriteLine(" Gender:        " + info.Gender);  
          Console.WriteLine(" Description:   " + info.Description);  
          Console.WriteLine(" ID:            " + info.Id);  
          Console.WriteLine(" Enabled:       " + voice.Enabled);  
          if (info.SupportedAudioFormats.Count != 0)  
          {  
            Console.WriteLine( " Audio formats: " + AudioFormats);  
          }  
          else  
          {  
            Console.WriteLine(" No supported audio formats found");  
          }  

          string AdditionalInfo = "";  
          foreach (string key in info.AdditionalInfo.Keys)  
          {  
            AdditionalInfo += String.Format("  {0}: {1}\n", key, info.AdditionalInfo[key]);  
          }  

          Console.WriteLine(" Additional Info - " + AdditionalInfo);  
          Console.WriteLine();  
        }  
      }  
      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  
  }  
}  

from: SpeechSynthesizer.GetInstalledVoices Method (System.Speech.Synthesis) | Microsoft Learn