private void OnPropertyValidated(string propertyName, string error, bool notifyIfSameValidity = false)
{
if (!_enabled)
{
return;
}
var errorsChanged = false;
string oldError;
if (!Errors.TryGetValue(propertyName, out oldError) || error != oldError)
{
errorsChanged = true;
Errors[propertyName] = error;
OnPropertyChanged("Errors");
}
var oldValidity = IsValid;
if (errorsChanged)
{
IsValid = Errors.All(e => string.IsNullOrEmpty(e.Value));
}
if (IsValid != oldValidity || notifyIfSameValidity)
{
OnPropertyChanged("IsValid");
}
}