/// <summary>
/// UnaryExpression visit method
/// </summary>
/// <param name="u">The UnaryExpression expression to visit</param>
/// <returns>The visited UnaryExpression expression </returns>
internal override Expression VisitUnary(UnaryExpression u)
{
throw new NotSupportedException(Strings.ALinq_UnaryNotSupported(u.NodeType.ToString()));
}