static char DazniausiaiPasikartojantiRaide(string fv, ref int max)
        {
            string[] eilute = System.IO.File.ReadAllLines(fv, Encoding.GetEncoding(1257));
            string raides = "aąbcčdeęėfghiįyjklmnoprstuūųvzž";
            List<int> kiekradau = new List<int>();
            max = 0;
            char raide = ' ';
            for (int i = 0; i < raides.Length; i++)
            {
                int kiekis = 0;
                for (int j = 0; j < eilute.Length; j++)
                {
                    for (int jj = 0; jj < eilute[j].Length; jj++)
                    {
                        if (eilute[j][jj] == raides[i])
                        {
                            kiekis++;
                        }
                    }
                }
                kiekradau.Add(kiekis);
            }
            for (int i = 0; i < kiekradau.Count; i++)
            {
                if (max < kiekradau[i])
                {
                    max = kiekradau[i];
                    raide = raides[i];
                }
            }
            return raide;
        }