How to start `powercfg.exe -energy` from a .NET app?

Question

When I

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

It outputs:

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

Translated to English:

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

Even when running as admin.

Answer 1

I'm afraid I cannot duplicate your results; I get the results file as expected. But if it helps, perhaps my testing parameters will help you narrow down what may be the culprit in your environment:

• Running Visual Studio 2010 as Administrator
• Targeted .NET 4 Client Profile
• Compiled both x86 and Any CPU binaries
• Computer is running Windows 7 x64

Answer 2

Set the WorkingDirectory to the path energy.dll and powercfg.exe is located.