private void IApplication_OnPlayfieldUnloading(Eleon.Modding.IPlayfield playfield)
 {
     if (this.cboPlayfield.Items.Contains(playfield))
     {
         this.cboPlayfield.Items.Remove(playfield);
     }
 }
 private void IApplication_OnPlayfieldLoaded(Eleon.Modding.IPlayfield playfield)
 {
     if (!this.cboPlayfield.Items.Contains(playfield))
     {
         this.cboPlayfield.Items.Add(playfield);
     }
 }