Invoke generic method from PowerShell

How does one invoke a generic method from PowerShell?

For example, let's say I have an assembly MyAssembly.dll with a public
class MyClass. MyClass has (wait for it) MyGenericMethod<T>().

Let's say in PowerShell I load the assembly and get an instance of
MyClass:

[System.Reflection.Assembly]::LoadFrom("MyAssembly.dll")
$MyClassInstance = New-Object MyAssembly.MyClass

How do I invoke the generic method? I'm assuming the following is not
correct:

# Likely incorrect:
$MyClassInstance.MyGenericMethod<[string]>()

<zach.blocker@gmail.com> wrote in message
news:1181311127.954899.22060@g4g2000hsf.googlegroups.com...
> How does one invoke a generic method from PowerShell?

Take a look at this blog post by Lee Holmes:

http://www.leeholmes.com/blog/Creati...owerShell.aspx

--
Keith

I should amend the above to say that I did more than assume it wasn't
correct. I tested it at the prompt and got an error message:
The redirection operator '<' is not supported yet.

On Jun 8, 10:14 am, "Keith Hill [MVP]"
<r_keith_h...@mailhot.nospamIdotcom> wrote:
> Take a look at this blog post by Lee Holmes:
>
> http://www.leeholmes.com/blog/Creati...owerShell.aspx
> --
> Keith

That is a brilliant little script he's got. However, he is
instantiating a generic type. My example class above (MyClass) is
*not* a generic type, but it does have a generic method. Since it's
not a generic type, I can instantiate it easily using "New-Object",
however, how do I invoke a generic method on it?

On Jun 8, 7:25 am, zach.bloc...@gmail.com wrote:
> On Jun 8, 10:14 am, "Keith Hill [MVP]"
>
> <r_keith_h...@mailhot.nospamIdotcom> wrote:
> > Take a look at this blog post by Lee Holmes:
>
> >http://www.leeholmes.com/blog/Creati...owerShell.aspx
> > --
> > Keith
>
> That is a brilliant little script he's got. However, he is
> instantiating agenerictype. My example class above (MyClass) is
> *not* agenerictype, but it does have agenericmethod. Since it's
> not agenerictype, I can instantiate it easily using "New-Object",
> however, how do I invoke agenericmethodon it?

Zach - Have you been able to find a solution? I too would very much
like to know how to all generic methods from a non-generic instance.

Nothing yet, Mesan. I'm hoping someone can post a reply here. Of
course, if I find a solution offline, I will post it here as well.

On Jun 8, 10:18 pm, zach.bloc...@gmail.com wrote:
> Nothing yet, Mesan. I'm hoping someone can post a reply here. Of
> course, if I find a solution offline, I will post it here as well.

Given this class:

using System;
using System.Collections.Generic;
using System.Text;

namespace ClassLibrary
{
public class Class
{
private string id;

public Class( string id )
{
this.id = id;
}

public void GenericMethod<T, G>()
{
Console.WriteLine( string.Format( "{0}'s T is a: {1}", id,
typeof( T ).Name ) );
Console.WriteLine( string.Format( "{0}'s G is a: {1}", id,
typeof( G ).Name ) );
}
}
}

Once the assembly is loaded, GenericMethod can be called in this way:

$classInstance = New-Object ClassLibrary.Class "something"

[Type] $classType = $classInstance.GetType()

[Reflection.MethodInfo] $methodInfo =
$classType.GetMethod( "GenericMethod" )

$genericMethodInfo = $methodInfo.MakeGenericMethod( [Type[]]
@( "".GetType(), (0).GetType() ) )

$genericMethodInfo.Invoke( $classInstance, $null )

I hope this helps.

Lee Holmes posted a solution:

http://www.leeholmes.com/blog/Invoki...owerShell.aspx