Math.DivRem vs %

using System;
using System.Diagnostics;
using System.Security.Cryptography;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();

            sw.Start();
            for (var i = 0; i < 100000; i++)
            {
                secgen(10, 6000000);
            }
            sw.Stop();

            Console.WriteLine(sw.ElapsedMilliseconds);

            sw.Reset();
            sw.Start();
            for (var i = 0; i < 100000; i++)
            {
                secgen2(10, 6000000);
            }
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);

            Console.ReadKey();
        }

        private static int secgen2(int minvalue, int maxvalue)
        {
            Func<int, int, int, int> modular = (a, b, mod) =>
            {
                var rem = a + b%mod;

                if (rem < minvalue) rem += minvalue;

                return rem;
            };


            byte[] entropyBytes = new byte[257];
            RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();

            rng.GetBytes(entropyBytes);
            int value = entropyBytes[0];
            for (int i = 1; i < 257; i++)
            {
                value = modular(value, entropyBytes[i], maxvalue);
            }

            //MessageBox.Show(value.ToString());
            return value;
        }

        private static int secgen(int minvalue, int maxvalue)
        {
            Func<int, int, int, int> modular = (a, b, mod) =>
            {
                long rem;
                Math.DivRem((long) a + (long) b, (long) mod, out rem);

                if (rem < minvalue) rem += minvalue;

                return (int) rem;
            };


            byte[] entropyBytes = new byte[257];
            RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();

            rng.GetBytes(entropyBytes);
            int value = entropyBytes[0];
            for (int i = 1; i < 257; i++)
            {
                value = modular(value, entropyBytes[i], maxvalue);
            }

            //MessageBox.Show(value.ToString());
            return value;
        }
    }
}

// Outputs:
//
// 2083
// 921