public void SaveButton()
        {
            if (LoggedUser.Instance.IsManager())
            {
                this.taskToEdit.Name        = this.NameTextBox;
                this.taskToEdit.Description = this.DescriptionTextBox;

                var helper = new InfoHelper();
                helper.EditTask(this.taskToEdit);

                Show.SuccesBox("Pomyslnie edytowano zadanie.");
                this.TryCloseAsync();
            }
            else
            {
                Show.ErrorBox("Nie masz uprawnień do edytowania zadań!");
            }
        }