OrderCommand.cs

namespace CommandPattern;

public abstract class OrderCommand
{
    protected Barbecuer Receiver;

    protected OrderCommand(Barbecuer receiver) => Receiver = receiver ?? throw new ArgumentNullException(nameof(receiver));

    public abstract void ExecuteCommand();
}

internal class BakeMuttonCommand : OrderCommand
{
    public BakeMuttonCommand(Barbecuer receiver) : base(receiver)
    {
    }

    public override void ExecuteCommand()
    {
        Receiver.BakeMutton();
    }

    public override string ToString() => nameof(BakeMuttonCommand);
}

internal class BakeChickenWingCommand : OrderCommand
{
    public BakeChickenWingCommand(Barbecuer receiver) : base(receiver)
    {
    }

    public override void ExecuteCommand()
    {
        Receiver.BakeChickenWing();
    }

    public override string ToString() => nameof(BakeChickenWingCommand);
}