/// <summary>
/// Is the specification satisfied?
/// </summary>
/// <returns></returns>
public override Expression <Func <T, bool> > IsSatisfied()
{
var expression1 = _spec1.IsSatisfied();
var expression2 = _spec2.IsSatisfied();
return(expression1.Or(expression2));
}
/// <summary>
/// Is the specification satisfied?
/// </summary>
/// <returns></returns>
public override Expression <Func <T, bool> > IsSatisfied()
{
return(ExpressionExtensions.Not(_spec.IsSatisfied()));
}