MP3 afsprelen met Csharp.net

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows;
using System.Runtime.InteropServices; //dll import mogelijk maken

namespace defaultSounds
{
    public partial class Form1 : Form
    {
        string soundCommand;

        // nodig voor de muziek
        [DllImport("winmm.dll")]
        private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

        public Form1()
        {
            InitializeComponent();
        }

        private void playMusic(string soundFile) 
        {
            if (soundCommand == "play MediaFile")
            {
                soundCommand = "close MediaFile";
                mciSendString(soundCommand, null, 0, IntPtr.Zero);
            }

            soundCommand = "open \""+ soundFile +"\" type mpegvideo alias MediaFile";
            mciSendString(soundCommand, null, 0, IntPtr.Zero);
            soundCommand = "play MediaFile";
            mciSendString(soundCommand, null, 0, IntPtr.Zero);
        }

        private void button1_Click(object sender, EventArgs e)
        {
           playMusic("type.wma"); 
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows;
using System.Runtime.InteropServices; //dll import mogelijk maken
 
namespace defaultSounds
{
    public partial class Form1 : Form
    {
        string soundCommand;
 
        // nodig voor de muziek
        [DllImport("winmm.dll")]
        private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void playMusic(string soundFile) 
        {
            if (soundCommand == "play MediaFile")
            {
                soundCommand = "close MediaFile";
                mciSendString(soundCommand, null, 0, IntPtr.Zero);
            }
 
            soundCommand = "open \""+ soundFile +"\" type mpegvideo alias MediaFile";
            mciSendString(soundCommand, null, 0, IntPtr.Zero);
            soundCommand = "play MediaFile";
            mciSendString(soundCommand, null, 0, IntPtr.Zero);
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
           playMusic("type.wma"); 
        }
    }
}