private void ProfitsBtn_Click(object sender, RoutedEventArgs e)
{
try
{
ImpBL bl = ImpBL.Instance;
double profits = bl.GetProfits();
profitsTextBox.Text = profits.ToString();
}
catch (Exception err)
{
MessageBox.Show(err.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
