DiceGame/DiceGame/Die.cs

namespace DiceGame
{
    public class Die
    {
        Random random = new Random();

        public Die(int sides)
        {
            this.sides = sides;
        }

        public Die(bool random)
        {
            this.sides = this.random.Next(1, 13);            
        }

        public int sides { get; set; }

        public int Throw()
        {
            return random.Next(1, sides + 1);
        }
    }
}