System.Waf.Presentation.ValidationTracker.AddError C# (CSharp) Метод

        private void AddError(object validationSource, ValidationError error)
        {
            errors.Add(new Tuple<object, ValidationError>(validationSource, error));

            if (validationSource is FrameworkElement)
            {
                ((FrameworkElement)validationSource).Unloaded += ValidationSourceUnloaded;
            }
            else if (validationSource is FrameworkContentElement)
            {
                ((FrameworkContentElement)validationSource).Unloaded += ValidationSourceUnloaded;
            }
        }