Write Escape Sequence for Epson printer

[zlristovski]

I want to send control codes for Epson printer with c# application, I wrote some code, I have the connection with the printer, but when I am sending codes it not responding. On the other side, I found Java application for sending control codes, from that app some of the codes is working but not all of them. For example I want to use ESC EM 66 control code but when I am sending this code, printer not responding or just print the code in numbers. Can anyone to help me to find solution for this problem? I read many articles but without help.

The code who I use is:

 class Program
    {
        public const short FILE_ATTRIBUTE_NORMAL = 0x80;
        public const short INVALID_HANDLE_VALUE = -1;
        public const uint GENERIC_READ = 0x80000000;
        public const uint GENERIC_WRITE = 0x40000000;
        public const uint CREATE_NEW = 1;
        public const uint CREATE_ALWAYS = 2;
        public const uint OPEN_EXISTING = 3;

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess,
            uint dwShareMode, IntPtr lpSecurityAttributes, uint dwCreationDisposition,
            uint dwFlagsAndAttributes, IntPtr hTemplateFile); 
        static void Main(string[] args)
        {
           
            IntPtr ptr = CreateFile("LPT1", GENERIC_WRITE, 0,
                     IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);

            if (ptr.ToInt32() == -1)
            {
                Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
            }
            else
            {
                string command = "test";
                FileStream lpt = new FileStream(ptr, FileAccess.ReadWrite);
                Byte[] buffer = new Byte[2048];
                
                buffer = System.Text.Encoding.ASCII.GetBytes(command);
          //    lpt.Write(buffer, 0, buffer.Length);
                lpt.Write(GetDocument(), 0, GetDocument().Length);
                lpt.Close();
            }
          
        }
        private static byte[] GetDocument()
        {
            using (var ms = new MemoryStream())
            using (var bw = new BinaryWriter(ms))
            {
              //  bw.Write((char)0x1B);//esc
                //  bw.Write('@');
             //   bw.Write((char)0x0C);//ff
            
                bw.Write('a');
                bw.Write((byte)66);
                bw.Write((byte)3);

                bw.Flush();

                return ms.ToArray();
            }
        }
    }

When I am using the method GetDocument() printer is not responding, but it prints only text when I call the buffer variable:

lpt.Write(buffer, 0, buffer.Length);

[zlristovski]

ESC EM control code for Epson printer

I want to know how to use ESC EM 82 control code for epson printer in C# application, I don't know how to correct call this code. I am colling FF control code and sending to the printer, that is succeed, but I don't know how to call ESC EM 82 or any other code?