高分求教打印机命令输出！！
厂商提供打印机切纸命令VB6.0实现

Print #1, Chr$(&H1B); Chr$(&H64); Chr$(&H0); '切纸命令

//------------------------------------------------------
//以下是C#向打印机输出命令

[DllImport( "Kernel32.dll ")]
static extern IntPtr CreateFile(
string filename,
[MarshalAs(UnmanagedType.U4)]FileAccess fileaccess,
[MarshalAs(UnmanagedType.U4)]FileShare fileshare,
int securityattributes,
[MarshalAs(UnmanagedType.U4)]FileMode creationdisposition,
int flags,
IntPtr template);

[DllImport( "kernel32.dll ")]
static extern bool CloseHandle(IntPtr hObject);

private void btncut_Click(object sender, EventArgs e)
{
try
{
SafeFileHandle sfh = null;
IntPtr ptr = CreateFile( "PRN ", FileAccess.Write, FileShare.Write, 0, FileMode.Open, 0, IntPtr.Zero);
sfh = new SafeFileHandle(ptr, true);
StreamWriter sw = new StreamWriter(new FileStream(sfh, FileAccess.Write));
string Instruction = null;
Instruction = Convert.ToChar(27) + Instruction + Convert.ToChar(100) + Instruction + Convert.ToChar(0);
byte[] buffer = System.Text.Encoding.Default.GetBytes(Instruction);
sw.WriteLine(打印机命令); ------------如何填写?
sw.Close();

CloseHandle(ptr);
}
catch (Exception ex)
{
MessageBox.Show(Convert.ToString(ex));
}
}
如何在C#中实现

多谢大家!!

[解决办法]

[解决办法]
// StreamWriter没有WriteLine方法吧
// byte[] buffer = System.Text.Encoding.Default.GetBytes(Instruction); 不用吧

sw.Write(Instruction);
[解决办法]
string Instruction = null;
Instruction = Convert.ToChar(27) + Instruction + Convert.ToChar(100) + Instruction + Convert.ToChar(0);
sw.WriteLine(Instruction);