求高手封装成一个方法,该怎么解决

 private void Form1_Load(object sender, EventArgs e)
        {
            PrintDocument prtdoc = new PrintDocument();

            printerList.Items.Clear();//清空ComboBox
            string strDefaultPrinter = prtdoc.PrinterSettings.PrinterName;//获取默认的打印机名 
            foreach (String strPrinter in PrinterSettings.InstalledPrinters)
            //在列表框中列出所有的打印机, 
            {
                printerList.Items.Add(strPrinter);
                if (strPrinter == strDefaultPrinter)//把默认打印机设为缺省值 
                {
                    printerList.SelectedIndex = printerList.Items.IndexOf(strPrinter);
                }
            }

        }