[.net] Problem with generics

class Triplet<scalar>
    {
        public scalar a, b, c;
        public Triplet(scalar A, scalar B, scalar C)
        {
            a = A; b = B; c = C;
        }

        public Triplet()
        {

        }

        public static Triplet<scalar> operator +(Triplet<scalar> A, Triplet<scalar> B)
        {
            return new Triplet<scalar>(A.a + B.a, A.b + B.b, A.c + B.c);
        }

        public static Triplet<scalar> operator /(Triplet<scalar> A, scalar divisor)
        {
            return new Triplet<scalar>(A.a / divisor, A.b / divisor, A.c / divisor);
        }

        public Triplet<scalar> Set(scalar A, scalar B, scalar C)
        {
            a = A; b = B; c = C;
            return this;
        }

        /// <summary>
        /// Returns true if there is a combination of the two triangles points that 
        /// causes them to be equal.  For instance, Triangle 5 0 3 and 3 5 0 would be considered
        /// equal.
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public override bool Equals(object obj)
        {
            if(obj.GetType() != typeof(Triplet<scalar>))
                return false;

            Triplet<scalar> temp = new Triplet<scalar>();
            Triplet<scalar> other = (Triplet<scalar>) obj;

            if(ExactEqual(this, temp.Set(other.a, other.b, other.c)))
                return true;

            if(ExactEqual(this, temp.Set(other.b, other.a, other.c)))
                return true;
            
            if(ExactEqual(this, temp.Set(other.a, other.c, other.b)))
                return true;

            if(ExactEqual(this, temp.Set(other.c, other.b, other.a)))
                return true;

            if(ExactEqual(this, temp.Set(other.b, other.c, other.a)))
                return true;

            if(ExactEqual(this, temp.Set(other.c, other.a, other.b)))
                return true;
            
            return false; 
        }

        public override int GetHashCode()
        {
            return base.GetHashCode();
        }

        public static bool operator ==(Triplet<scalar> A, Triplet<scalar> B)
        {
            return Equals(A, B);
        }

        public static bool operator !=(Triplet<scalar> A, Triplet<scalar> B)
        {
            return !Equals(A, B);
        }

        bool ExactEqual(Triplet<scalar> a, Triplet<scalar> b)
        {
            if(a.a == b.a &&
               a.b == b.b &&
               a.c == b.c)
               return true;
            return false;
        }
    }