Лезут крокозябры. Что я делаю не так? - C#

  static void Main(string[] args)
        {
            CHCP();
            string com = "";
            while (com != "exit")
            {
                Console.Write(@"\>");
                com = Console.ReadLine();
                CMDInterraction(com);

                if (File.Exists(@"c:\log.txt")) {
                    Console.WriteLine(File.ReadAllText(@"c:\log.txt", Encoding.UTF7));
                        }
            }
  
        }

        /// <summary>
        /// Взаимодействие с командной строкой
        /// </summary>
        /// <param name="command">Команда</param>
        static void CMDInterraction(string command)
        {
            string cmd = command + @" >c:\log.txt";
 
            var proc = new ProcessStartInfo()
            {
                UseShellExecute = true,
                WorkingDirectory = @"C:\Windows\System32",
                FileName = @"C:\Windows\System32\cmd.exe",
                Arguments = "/c " + cmd,
                WindowStyle = ProcessWindowStyle.Hidden
            };
 
            Process.Start(proc);
        }
 
        static void CHCP()
        {

            string cmd = "chcp 855";
 
            var proc = new ProcessStartInfo()
            {
                UseShellExecute = true,
                WorkingDirectory = @"C:\Windows\System32",
                FileName = @"C:\Windows\System32\cmd.exe",
                Arguments = "/c " + cmd,
                WindowStyle = ProcessWindowStyle.Hidden
            };
 
            Process.Start(proc);
        }