private void AddExpressionToList()
{
String addedEexpression = ExpressionTextBox.Text;
if (String.IsNullOrEmpty(addedEexpression) || String.IsNullOrWhiteSpace(addedEexpression))
{
MessageBox.Show("Expression cannot be null or empty");
return;
}
try
{
_cl.AddExpression(addedEexpression);
ExpressionList.Items.Add(addedEexpression);
ExpressionTextBox.Clear();
}
catch (Exception)
{
MessageBox.Show("Some exception thrown during parce entered expression. Expression can't added to list. Please check it");
}
}