❔ ✅ Dice Roll with Generic Math

public readonly struct Dice
{
    public readonly int sides;

    public Dice(int sides) => this.sides = sides;

    public override string ToString() => sides.ToString();

    public double GetAverage() => (sides + 1) / 2.0;

    public int RollInt(Random rng) => rng.Next(1, sides + 1);
    public long RollLong(Random rng) => rng.NextInt64() * sides + 1;
    public float RollFloat(Random rng) => rng.NextSingle() * sides + 1;
    public double RollDouble(Random rng) => rng.NextDouble() * sides + 1;

    public T Roll<T>(Random rng) where T : INumber<T> 
    {
        var type = typeof(T);
        if (type == typeof(int))
            return (T)(object)RollInt(rng);
        if (type == typeof(long))
            return (T)(object)RollLong(rng);
        if (type == typeof(float))
            return (T)(object)RollFloat(rng);
        if (type == typeof(double))
            return (T)(object)RollDouble(rng);
        return T.One;
    }
}