// TYRE CLASS
//-----------------------------------------------------------------------------------
public abstract class Tyre
{
    public abstract string Name { get; }

    private double hardness;
    public double Hardness
    {
        get { return hardness; }
        protected set { hardness = value; }
    }

    private double degradation;
    public double Degradation
    {
        get { return degradation; }
        protected set { degradation = value; }
    }

    protected Tyre(double hardness)
    {
        this.Hardness = hardness;
        this.Degradation = 100;
    }
    public virtual void DegradeTyre()
    {
        this.Degradation = this.Degradation - this.Hardness;
        if (this.Degradation < 0)
        {
            ////throw new Exception();
        }
    }
}

//-----------------------------------------------------------------------------------
//UltrasoftTyre
public class UltrasoftTyre
    : Tyre
{
    public UltrasoftTyre(double hardness,double grip) : base(hardness)
    {
        this.Grip = grip;
        this.Name = "Ultrasoft";
    }

    private double grip;
    public double Grip
    {
        get { return grip; }
        protected set { grip = value; }
    }

    public override string Name { get; }

    public override void DegradeTyre()
    {
        this.Degradation = this.Degradation - (this.Hardness + this.Grip);
        if (this.Degradation < 30)
        {
            ////throw new Exception();
        }
    }
}

//-----------------------------------------------------------------------------------
//HardTyre
public class HardTyre
    : Tyre
{
    public HardTyre(double hardness) : base(hardness)
    {
        this.Name = "Hard";
    }

    public override string Name { get; }
}