Basically, what you're doing is iterating through all of your songs, and loading each one into the player. Of course, your player can only handle one of them, so the last one of your collection is effectively playing.
What you should do is loading your first song, and at the end of each media, you have to load the n + 1 song.
private System.Timers.Timer Timer; // Used to introduce a delay after the MediaEnded event is raised, otherwise player won't chain up the songs
private void ScheduleSongs() {
var count = 0;
var firstSong = atrinktas.FirstOrDefault(); // using Linq
if(firstSong == null) return;
axWindowsMediaPlayer1.URL = firstSong.getVardas();
// PlayStateChange event let you listen your player's state.
// https://msdn.microsoft.com/fr-fr/library/windows/desktop/dd562460(v=vs.85).aspx
axWindowsMediaPlayer1.PlayStateChange += delegate(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e) {
if(e.newState == 8 && count < atrinktas.Count()) {
count++;
var nextSong = atrinktas[count];
axWindowsMediaPlayer1.URL = nextSong.getVardas();
Timer = new System.Timers.Timer() { Interval = 100 };
Timer.Elapsed += TimerElapsed; // Execute TimerElapsed once 100ms is elapsed
}
};
}
private void TimerElapsed(object sender, System.Timers.ElapsedEventArgs e)
{
Timer.Stop();
Timer.Elapsed -= TimerElapsed;
Timer = null;
axWindowsMediaPlayer1.Ctlcontrols.play(); // Play the next song
}