/// <summary>
/// Handles the DropDownClosed event of the txtbxSymbolNew control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="bool"/> instance containing the event data.</param>
private void TxtbxSymbolNewDropDownClosed(object sender, RoutedPropertyChangedEventArgs <bool> e)
{
var symbol = ((AutoCompleteBox)sender).Text.ToUpper();
if ((bool)_vm.CheckForExistingStockBySymbolName(symbol))
{
((AutoCompleteBox)sender).Text = "";
if (_vm.AddStockCommand.CanExecute(symbol))
{
_vm.AddStockCommand.Execute(symbol);
}
}
}