all chars in codepage

private byte[] GetByteArray(int Code, int Len)
        {
            byte[] Ret = new byte[Len];
            byte[] conv = BitConverter.GetBytes(Code);

            for (int i = 0; i < Len; i++)
            {
                Ret[i] = conv[i];
            }

            return Ret;
        }
                       ........................
                        int CP = 1251;
                        Encoding enc = Encoding.GetEncoding(CP);
                        int maxbyte = enc.GetMaxByteCount(1);

                        string[] tbl = new string[maxbyte];

                        for (int i = 1; i <= maxbyte; i++)
                        {
                            for (Int64 j = 0; j < int.MaxValue; j++)
                            {
                                byte[] chrbuf = GetByteArray((int)j, i);
                                tbl[i]=tbl[i]+enc.GetString(chrbuf);
                            }
                        }

                        MessageBox.Show(char.MaxValue.ToString() + " ");