C# - How to get variables from a different method?

I need too make an addition of 2 random numbers, stored in an int variable and in a different method. What is the easiest and simplest way to do it please?

Thanks!

public void generateNumbers()
        {
            Random rand = new Random();
            int randomNumber = rand.Next(1, 11);
            int randomNumber2 = rand.Next(1, 11);
            Console.WriteLine("Number1: " + randomNumber);
            Console.WriteLine("Number2: " + randomNumber2);
        }

        public int findSum()
        {
            //sum = randomNumber + randomNumber2 //gets sum from the method generateNumbers()
            return sum;
        }