C#如何修改電腦的預設印表機

using System.Management;</p><p> private ManagementObjectSearcher query;<br /> private ManagementObjectCollection queryCollection;<br /> string _classname="SELECT * FROM Win32_Printer";</p><p> query=new ManagementObjectSearcher(_classname);<br /> queryCollection = query.Get();</p><p> foreach (ManagementObject mo in queryCollection)<br /> {<br /> if (string.Compare(mo["Name"].ToString(),PrinterName,true)==0)<br /> {<br /> mo.InvokeMethod("SetDefaultPrinter",null);<br /> break;<br /> }<br /> }<br />