Cannot load Security.Cryptography.X509Certificates.RSACertificateExtensions

[ErnieB]

Hello

can someone please help me with the following (perhaps I am missing a DLL)
One Windows 2012 R2 I need to load Security.Cryptography.X509Certificates.RSACertificateExtensions part as part of a larger PowerShell script

I get the standard message

Add-Type -AssemblyName Security.Cryptography.X509Certificates.RSACertificateExtensions

Add-Type : Cannot add type. The assembly 'Security.Cryptography.X509Certificates.RSACertificateExtensions' could not be found.
At line:1 char:1
+ Add-Type -AssemblyName Security.Cryptography.X509Certificates.RSACert ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Security.Crypto...icateExtensions:String) [Add-Type], Exception
+ FullyQualifiedErrorId : ASSEMBLY_NOT_FOUND,Microsoft.PowerShell.Commands.AddTypeCommand

Add-Type : Cannot add type. One or more required assemblies are missing.
At line:1 char:1
+ Add-Type -AssemblyName Security.Cryptography.X509Certificates.RSACert ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Add-Type], InvalidOperationException
+ FullyQualifiedErrorId : ASSEMBLY_LOAD_ERRORS,Microsoft.PowerShell.Commands.AddTypeCommand

I assume I am missing a DLL

on my Windows 10 PC I can do the following OK

[Security.Cryptography.X509Certificates.RSACertificateExtensions] | gm

if I try this on my Windows 2012 R2 Server I get the error

PS C:\> [Security.Cryptography.X509Certificates.RSACertificateExtensions] | gm
Unable to find type [Security.Cryptography.X509Certificates.RSACertificateExtensions]. Make sure that the assembly that contains this type is loaded.
At line:1 char:2
+ [Security.Cryptography.X509Certificates.RSACertificateExtensions] | gm
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (Security.Crypto...icateExtensions:TypeName) [], RuntimeException
+ FullyQualifiedErrorId : TypeNotFound


Please advise as I need to use this namespace and its methods when running my script on a Windows 2012 R2 Server

Thanks
Ernest

[jvierra]

You do not need to load the assembly. this is not an assembly, it is a type. Just reference it:

[Security.Cryptography.X509Certificates.RSACertificateExtensions][/b}

It may be that you are missing Net 4.6 which is an optional install on 2012r2
See: https://msdn.microsoft.com/en-us/librar ... .110).aspx