using (var process = new Process
{
    StartInfo = new ProcessStartInfo
    {
         FileName = "powercfg.exe",Arguments = "-energy",RedirectStandardOutput = true,UseShellExecute = false,}
})
{
    process.Start();
    process.WaitForExit();
}

它输出：

A biblioteca de Diagnóstico de Eficiência de Consumo de Energia (energy.dll) não
pôde ser carregada.

翻译成英文：

The Energy Consumption Efficiency Diagnostic library (energy.dll) couldn’t be loaded.

即使以管理员身份运行