exercism.org/csharp/lucians-luscious-lasagna/LuciansLusciousLasagna.cs

class Lasagna
{
    public int ExpectedMinutesInOven()
    {
        return 40;
    }

    public int RemainingMinutesInOven(int ActualMinutes)
    {
        return this.ExpectedMinutesInOven() - ActualMinutes;
    }

    public int PreparationTimeInMinutes(int NumberOfLayers)
    {
        return NumberOfLayers * 2;
    }

    public int ElapsedTimeInMinutes(int NumberOfLayers, int OvenTime)
    {
        return this.PreparationTimeInMinutes(NumberOfLayers) + OvenTime;
    }
}