System.Management does not work with .net core 3.0 prev 7

[Pilchie]

From @HolyOne on Sunday, August 4, 2019 10:10:32 AM

I have an existing class using System.Management code which works.

I created a .net core 3 web app (I run on visual studio with Administrator permisions)
I get marshal error when I try to connect WMI at the first line.

This is the line I call
DNS = new ManagementScope (@"\\localhost\root\MicrosoftDNS") ;

This is the error I get
System.Runtime.InteropServices.MarshalDirectiveException: 'Cannot marshal 'parameter dotnet/corefx#3': Cannot marshal a string by-value with the [Out] attribute.'

I do not use any win32 dll call or out parameter in my code so I thought it must be an internal error on System.Management or .net core 3 preview

Thank you

Copied from original issue: dotnet/aspnetcore#12860

[Pilchie]

From @HolyOne on Monday, August 5, 2019 8:55:54 AM

I just tried latest prerelease ( 4.6.0-preview7.19362.9) and it seems it passes this line

[danmoseley]

@HolyOne yes this was fixed in an earlier preview. https://github.com/dotnet/corefx/issues/35694
It seems you are unblocked now and this issue can be closed is that right?

[HolyOne]

Yes thank you