enum PayGrade : byte
{
    Low,
    High
}

class Employee
{
    public PayGrade PayGrade { get; set; }

    [Computed]
    public decimal Salary
    {
        get
        {
            if (PayGrade == PayGrade.High)
            {
                return 1000M;
            }

            return 10M;
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        var employees = new[]
        {
            new Employee { PayGrade = PayGrade.Low },
            new Employee { PayGrade = PayGrade.High },
        }
        .AsQueryable();

        var salaries = (from employee in employees
                        select employee.Salary)
                        .Decompile()
                        .ToList();
    }
}