C# alternative for "freopen("CONIN$")"

FreopenInCSharp

void Main()
{
   AllocConsole();
   SetupIn();
   SetupOut();
   
   Console.WriteLine("Output something");
   var input = Console.ReadLine();
}

void SetupIn() => Console.SetIn(CreateInStream()); // freopen("CONOUT$", "w", stdout);
void SetupOut() => Console.SetOut(CreateOutStream()); // freopen("CONIN$", "r", stdin);
StreamWriter CreateOutStream() => new(CreateFileStream("CONOUT$", GENERIC_WRITE, FILE_SHARE_WRITE, FileAccess.Write)) { AutoFlush = true };
StreamReader CreateInStream() => new(CreateFileStream("CONIN$", GENERIC_READ, FILE_SHARE_READ, FileAccess.Read));

FileStream CreateFileStream(string name, uint desAccess, uint shareMode, FileAccess fileAccess)
{
    var fileHandle = CreateFileW(name, desAccess, shareMode, 0, (uint)FileMode.Open, (uint)FileAttributes.Normal, 0);
    var file = new SafeFileHandle(fileHandle, true);
    return !file.IsInvalid ? new FileStream(file, fileAccess) : null;
}

const uint
    GENERIC_WRITE = 0x40000000,
    GENERIC_READ = 0x80000000,
    FILE_SHARE_READ = 1,
    FILE_SHARE_WRITE = 2;
    
const string kernel = "kernel32";

[DllImport(kernel, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern 
    nint CreateFileW(string fileName, uint desAccess, uint shareMode, nint securityAttb, uint creationDispose, uint flagsAndAttb, nint templateFile);

[DllImport(kernel)] [return: MarshalAs(UnmanagedType.Bool)] public static extern 
    bool AllocConsole();