C#遍历打印机

    #region 获取本机默认打印机名称
        ArrayList al1=new ArrayLIst();
        private static PrintDocument fPrintDocument = new PrintDocument();
        /// <summary>
        /// 获取本机默认打印机名称
        /// </summary>
        public static String DefaultPrinter
        {
            get
            {
                return fPrintDocument.PrinterSettings.PrinterName;
            }
        }
        public void Add()
        {
            al1.Add(DefaultPrinter);
            foreach (String fPrinterName in PrinterSettings.InstalledPrinters)
            {
                if (!al1.Contains(fPrinterName))
                {
                    al1.Add(fPrinterName);
 
                }
            }
 
        }
 
        public void Combox()
        {
            comboBox1.Text = al1[].ToString();
            foreach (string xx in al1)
            {
                // listBox1.Items.Add(xx);
                comboBox1.Items.Add(xx);
 
            }
        }
        #endregion