'Meta file .dll could not be found' during PS Add-Type (C# code)

Question

I want to execute C# code in a PS script by using Add-Type. But I receive: Metadata file 'Microsoft.Azure.ServiceBus.dll' could not be found. The C# code uses a NuGet package called "Microsoft.Azure.ServiceBus".

My referenced assembly seems not to work. Here is my code:

PS

$cmd = {

$Assem = ( 
"Microsoft.Azure.ServiceBus", 
"netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51"
) 

$Source = (Get-Content -Path "D:\myPath\csharp-code.cs" -ReadCount 0) -join "`n"

Add-Type -ReferencedAssemblies $Assem -TypeDefinition $Source -Language CSharp 
[ABC.Azure.ServiceBus.TopicSubscriber]::test()
}

# Execute script as Job to avoid "Add-Type"-conflict during development changes
$j = Start-Job -ScriptBlock $cmd

do 
{
  Receive-Job -Job $j
} while ( $j.State -eq "Running" )

C#

using Microsoft.Azure.ServiceBus;
using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Timers;

namespace ABC.Azure.ServiceBus
{
  class TopicSubscriber
  {
    bool test()
    {
        <more code>
    }
  }
}

Whats the root of this issue and how can I fix it? Unfortunately I am not very familiar with PS nor C#.

Answer 1

The problem you're receiving is essentially: File not found.

The root cause is your relative path of the referenced assembly in -

$assemblies = @(
    'Microsoft.Azure.ServiceBus'
    'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
)

since Microsoft.Azure.ServiceBus isn't in the GAC.

I suspect if you use Set-Location where the Microsoft.Azure.ServiceBus.dll file is, you will resolve your problem.