This gist shows the firing of a NotifyPropertyChanged event through a lambda.

Fire NotifyPropertyChanged

public ObservableCollection<SudokuRowViewModel> Rows
{
    get
    {
        return _rows;
    }
    set
    {
        _rows = value;
        NotifyPropertyChanged(() => Rows);
    }
}

public bool IsSolved
{
    get
    {
        return _isSolved;
    }
    set
    {
        _isSolved = value;
        NotifyPropertyChanged(()=> IsSolved);
    }
}