Stuck on Frog Tongues. I am getting compile errors that don't show up in Visual Studio.

using System;
namespace Treehouse.CodeChallenges
{
    class FrogStats
    {
        public static double GetAverageTongueLength(Frog[] frogs)
        {
            double sumTongues = 0.0;
            double result = 0.0;
            for (int i = 0; i < frogs.Length; i++)
            {
                sumTongues += double.Parse(frogs[i]);
            }
            result = sumTongues / frogs.Length;
            return result;
        }
    }
}

namespace Treehouse.CodeChallenges
{
    public class Frog
    {
        public int TongueLength { get; }

        public Frog(int tongueLength)
        {
            TongueLength = tongueLength;
        }
    }
}