/// <summary>
 /// Ouvre le TriggerManager
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btnChoose_Click(object sender, EventArgs e)
 {
     _Service.SaveVariables();
     FormsManager.Instance.VariableManager.FormClosed      += new FormClosedEventHandler(VariableManager_FormClosed);
     FormsManager.Instance.VariableManager.SelectedVariable = VariableGuid;
     FormsManager.Instance.VariableManager.ShowDialog(this);
 }