private void OKClicked(object sender, RoutedEventArgs e)
{
List <string> errors = new List <string>();
ISet <ValidationError> validationErrors = WindowsUtility.GetValidationErrors(this.grid);
foreach (ValidationError error in validationErrors)
{
errors.Add(error.ErrorContent?.ToString() ?? "Validation error");
}
if (errors.Count == 0)
{
this.DialogResult = true;
}
else
{
WindowsUtility.ShowError(this, string.Join("\n", errors));
}
}