C# 如何调用rundll32.exe

问题如下，请各位大大指点迷津

我想用C#调用系统自带的rundll32.exe, 来完成网络打印机的安装，具体命令如下：
C:\Windows\System32\rundll32 C:\Windows\SysWOW64\printui.dll,PrintUIEntry /if /b "BasePrinterName" /f absolutePath\driver.INF /r "PortName" /m "DriverModelName" /z

命令可以在cmd窗口下正常执行，但是如下代码会抛出错误“系统找不到指定的文件”：
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                Process proc = new Process();
                proc.StartInfo.FileName = @"C:\Windows\System32\rundll32 C:\Windows\SysWOW64\printui.dll,PrintUIEntry /if /b ""BasePrinterName"" /f " + Application.StartupPath + @"\Path\driver.INF /r ""PortName"" /m ""DriverModelName"" /z";
                proc.StartInfo.Arguments = "";
                proc.StartInfo.UseShellExecute = true;
                proc.StartInfo.Verb = "runas";
                proc.Start();      // 抛错代码
                proc.WaitForExit();
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