Adds an array of integers using a for loop

ForLoopAdder.cs

internal class ForLoopAdder : IIntegerAdder
{
    public int Add(int[] values)
    {
        int sum = 0;
        int count = values.Length;
        for (int i = 0; i < count; i++)
        {
            int value = values[i];
            sum += value;
        }
        return sum;
    }
}