Helpers.cs

namespace Problems
{
    public static class Helpers
    {
        /// <summary>
        /// Sums two numbers.
        /// </summary>
        /// <param name="a">First number.</param>
        /// <param name="b">Second number.</param>
        /// <returns>Returns the sum of two specified integer numbers.</returns>
        public static int Sum(int a, int b) => a + b;
    }
}