C# invoking Powershell, DLL could not be loaded -

i having odd problem.. following lines run fine directly in powershell:

1) powercfg -availablesleepstates     2) powercfg -energy 

straight forward enough, -energy generates file, has other flags play with.

running line 1 c# works fine (in of wonderful methods throughout site,

powershell s_ps = powershell.create(); s_ps.addscript("powercfg -availablesleepstates"); collection<psobject> results = s_ps.invoke(); 

(or versions run through pipeline, or create pscommand(), , on)

running same thing on -energy works fine console, if try call through c# starts talking missing 'energy.dll' or 1 of dependencies. dlls (including dependencies) of course there - since runs command line, , verified manually anyway.

visual studio running in admin mode, , on safe side built ap , tried running directly in admin mode too

i have tried manually loading dll

 s_ps.addscript(@"[reflection.assembly]::loadfrom('c:\windows\system32\energy.dll') | out-null"); 

but throws error saying

'could not load file or assembly 'file:///c:\windows\system32\energy.dll' or 1 of dependencies'

does have thoughts on else causing issues? (have run bit, if find solution before else of course post it, been hammering @ of day though no luck)

as far -engery switch command must understand proper , execute without asking assembly. thing since powercfg.exe -energy uses async model execution app needs wait till 60secs results. tried executing follows , worked.my env win 7 pro, i7,64bit

foreach (var v in powershellinterop.runpowershellscript("powercfg -energy"))             console.writeline(v);     internal static ienumerable runpowershellscript(string script)     {         powershell ps = powershell.create();         ps.addscript(script);         collection<psobject> result = ps.invoke();         foreach (psobject obj in result)         {             yield return (obj);         }     } 

result

enabling tracing 60 seconds... observing system behavior... analyzing trace data... analysis complete.

energy efficiency problems found.

5 errors 19 warnings 40 informational

see {path}\debug\energy-report.html mor e details.