C#

BackgroundMusic = new MCIPlayback(Properties.Settings.Default.SOUNG_MUTE);

BackgroundMusic.Open(soundFilePath, "mpegvideo");//mp3player

BackgroundMusic.Play();

    private String alias;
  
    /// <summary>
    /// Initializes a new instance of the <see cref="MCIPlayback"/> class.
    /// </summary>
    public MCIPlayback(bool m)
    {
      muted = m;
      this.alias = Guid.NewGuid().ToString("N");
    }

    /// <summary>
    /// Öffnet einen Stream.
    /// </summary>
    /// <param name="file">Datei</param>
    /// <param name="type">Medientyp (siehe Klasssenbeschreibung)</param>
    public void Open(string file, string type)
    {
      this.alias = Guid.NewGuid().ToString("N");
      name = file;
       string cmd = "open \"" + name + "\" type " + type + " alias \"" + alias + "\"";
       // Guid.NewGuid().ToString("N") 
        
      int errCode = mciSendString(cmd, null, 0, IntPtr.Zero);
      if (errCode == 0)
        isOpen = true;
      CheckError(errCode);
    }


    /// <summary>
    /// Plays the new track. :-)
    /// </summary>
    /// <param name="file">The file.</param>
    public void PlayNewTrack(string file)
    {
      Stop();
      //Close();
      Open(file, "mpegvideo"); //mpegvideo
      Play();
    }


    /// <summary>
    /// Mutes this instance.
    /// </summary>
    public void mute()
    {
      muted = true;
      Pause();
    }



    /// <summary>
    /// Spielt geladenen Stream ab.
    /// </summary>
    public void Play()
    {
      if (muted)
      {
        Pause();
        return;
      }
      if (!isOpen)
        return;
     // SeekToStart();
      string cmd = "play \"" + name + "\"";
      int errCode = mciSendString(cmd, null, 0, IntPtr.Zero);
      CheckError(errCode);
    }
}

SpeechSynthesizer _speechSynthesizer;
	
        private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
        {
			_speechSynthesizer = new SpeechSynthesizer();
        	_speechSynthesizer.Speak(Text1.Text);
        }
		
	
	

		private void Button2_Click(object sender, System.Windows.RoutedEventArgs e)
		{
			_speechSynthesizer = new SpeechSynthesizer();
		 	_speechSynthesizer.Speak(Text2.Text);
		}

using System;
using System.Windows.Forms;

namespace DelegateForm {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }
        
        private void TestDelegate() {
            System.Threading.Thread.Sleep(1000);
            OnAdd2List myDelegate;
            myDelegate = new OnAdd2List(Add2List);
            myDelegate(DateTime.Now.ToString());
        }

        private void Add2List(string s) {
            this.listView1.Items.Add(s);
        }

        private delegate void OnAdd2List(string s);

        private void button1_Click(object sender, EventArgs e) {
            this._thread = new System.Threading.Thread(new System.Threading.ThreadStart(TestDelegate));
            this._thread.Start();
        }

        private void button2_Click(object sender, EventArgs e) {

        }

        private System.Threading.Thread _thread;
    }
}