/// <summary>
 /// Removes the Troop for Custom Wave.
 /// </summary>
 private void RemoveTroopForCustomWave()
 {
     if (SelectedWaveTroop != null)
     {
         WaveTroops.Remove(SelectedWaveTroop);
     }
 }
 /// <summary>
 /// Adds the Troop for Custom Wave.
 /// </summary>
 private void AddTroopForCustomWave()
 {
     if (SelectedTroopForWave != null)
     {
         WaveTroops.Add(WaveModel.CreateNew(SelectedTroopForWave, SelectedTroopForWaveQuantity, SelectedTroopForWaveDelay));
     }
 }