PowerShell Invoke to get CPU usage

Question

Really frustrating because it seems to be so close to solution but can't get the last piece working. I need to get CPU usage using C#. PerformanceCounter is out the question because it takes forever to load the first time. So trying to use PowerShell (System.Management.Automation.dll) to execute what looks like a simple line:

(Get-CimInstance Win32_Processor).LoadPercentage

This is C#:

var cpuUsage = powerShell.AddCommand("Get-CimInstance").AddArgument("Win32_Processor").AddCommand("LoadPercentage").Invoke();

So you can see I'm trying to pipe LoadPercentage command but it won't work.

System.Management.Automation.CommandNotFoundException: 'The term 'LoadPercentage' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.'

The rest of code works. Can anyone please spot the issue here? Thank you in advance!

Answer 1

The issue here is that LoadPercentage is a property of the object, not a command. If you capture the result of the command and iterate through it's members, you should find what you're looking for:

var results = PowerShell.Create()
    .AddCommand("Get-CimInstance")
    .AddArgument("Win32_Processor")
    .Invoke();
        
foreach (var result in results)
{
    Console.WriteLine(result.Members["LoadPercentage"]?.Value);
}