Lambda function - (C#/PowerShell)

Hello,
I would like to request your help for simple question about if it possible to code c# script bloc inside a PowerShell lambda function. Just as follow:
$code = @"
using System;
namespace HelloWorld
{
public class Program
{
public static void Main(){
Console.WriteLine("Hello world!");
}
}
}
"@

Add-Type -TypeDefinition $code -Language CSharp

My code is correct, and I can run it in PowerShell without no issue, however, when I try to execute them inside à lambda expression, I got a strange error “Could not fin part of the path ‘/var/runtime/ref’
Anyone could help me please?
Thank you