private void OnRemoveOptionClick(object sender, RoutedEventArgs e)
{
ValidateDeleteButton();
if (OptionsCollection.Any() && IsSelectedItem())
{
var index = expressionsListBox.SelectedIndex;
OptionsCollection.RemoveAt(index);
var count = OptionsCollection.Count;
if (count > 0)
{
if (index >= count)
{
index = count - 1;
}
expressionsListBox.SelectedIndex = index;
}
else
{
if (!string.IsNullOrEmpty(_expressionEditor.ExpressionText))
{
_expressionEditor.ExpressionText = string.Empty;
}
}
}
}