public void OnValueChanged_Type(object sender, EventArgs e)
 {
     if (sender is ComboBox box)
     {
         _bacpropagationType = BackpropagationHandler.ToEnum((string)box.SelectedItem);
     }
 }
        public static string ToString(BackpropagationType type)
        {
            switch (type)
            {
            case BackpropagationType.Batch:
                return("Batch");

            case BackpropagationType.Online:
                return("Online");

            default:
                throw new ArgumentOutOfRangeException(nameof(type), type, null);
            }
        }