public void ChangeStage(String stage)
 {
     if (CurrentStage != null)
         CurrentStage.Close();
     CurrentStage = _stages[stage];
     CurrentStage.Open();
 }
 public SessionFrame(BaseStage stage, float timeLeft, SpeechKey narration)
 {
     this.TimeLeft = timeLeft;
     this.Stage = stage;
     this.Narration = narration;
 }
 public SessionFrame(BaseStage stage, SpeechKey narration)
 {
     this.Stage = stage;
     this.Narration = narration;
 }
 public SessionFrame(BaseStage stage, float timeLeft)
 {
     this.TimeLeft = timeLeft;
     this.Stage = stage;
 }