c#-4.0 - C# 试图从远程机器上检索 %logonserver%

Question

我在这里和那里看到了几个例子，这就是我想要实现的目标。我知道以下内容不起作用，但基本上我正在尝试从远程机器上提取 %logonserver% 。出于某种原因，wmi 查询不返回任何数据。

try
{
 System.Diagnostics.ProcessStartInfo startinfo = new System.Diagnostics.ProcessStartInfo("\\\\"+txtboxMachineName.Text+"\\c$\\Windows\\System32\\cmd.exe", "/c echo %logonserver%");
 startinfo.RedirectStandardOutput = true;
 startinfo.UseShellExecute = false;
 startinfo.CreateNoWindow = true;
 System.Diagnostics.Process proc = new Process();
 proc.StartInfo = startinfo;
 proc.Start();
 lblLogonServer.Text = proc.StandardOutput.ReadToEnd();
}
catch
{
 lblLogonServer.Text = "Error has been encountered obtaining Logon Server";
}