private void button_Click(object sender, RoutedEventArgs e)
{
try
{
if (textBox.Text == "" || textBox_Copy.Text == "" || textBox_Copy1.Text == "" || textBox_Copy2.Text == "" || textBox_Copy3.Text == "" || textBox_Copy4.Text == "" || unit.Description == "")
{
throw new ArgumentNullException("You need to fill all fields");
}
bl.AddHostingUnit(unit);
this.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
