❔ operator * cannot be applied to operands of type T and T

    struct Vector2D<T>  
    {
        public T x, y;

        public Vector2D()
        {
            x = y = default(T);
        }
         
        public Vector2D(T xPos, T yPos)
        {
            x = xPos;
            y = yPos;
        }

        public T GetMagnitude()
        {
            return System.Math.Sqrt(x * x + y * y); // error
        }
    }