How to do .NET Reflection in PowerShell

2013-04-17 11:29:29 +0000

This is all just .NET reflection code, converted from C# to PowerShell, but it can be useful…

Finding out which assemblies are loaded

PS> [AppDomain]::CurrentDomain.GetAssemblies()

GAC    Version        Location
---    -------        --------
True   v4.0.30319     C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorlib.dll
True   v4.0.30319     C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.PowerShell.ConsoleHost\v...
# etc.

Finding out which types are available in a given assembly

PS> $assembly = [AppDomain]::CurrentDomain.GetAssemblies() | where { $_.Location -like '*System.Numerics*' }
PS> $assembly.GetExportedTypes()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     BigInteger                               System.ValueType
True     True     Complex                                  System.ValueType

PS> $assembly.GetExportedTypes() | % { $_.FullName }
System.Numerics.BigInteger
System.Numerics.Complex

Get the members of a particular type

PS> [System.Numerics.Complex] | Get-Member
# ...list of members...

Get a list of constructors for a particular type

PS> [Org.BouncyCastle.Asn1.X509.ExtendedKeyUsage].GetConstructors() |
		foreach { $_.ToString() }

Void .ctor(Org.BouncyCastle.Asn1.X509.KeyPurposeID[])
Void .ctor(System.Collections.ArrayList)
Void .ctor(System.Collections.IEnumerable)