System.IO.FileNotFoundException: Could not load file or assembly 'Interop.iTunesLib, Version=1.13.0.0, Culture=neutral, PublicKeyToken=null'

Question

I'm trying to access iTunes using C#. The steps are to write a dll in C# and execute it with TypeScript using Overwolf API.

What I did

Generate .dll

I introduced iTunesLib based on this. Sorry for the Japanese article..

I created a ClassLibrary project in Visual Studio and tested it in a Windows Forms application. This worked.

Then built ClassLibrary and generated a .dll file.

namespace MyNamespace{
  public class MyClass {
    public void myFunction() {
      iTunesLib.iTunesAppClass iTunesApp = new iTunesLib.iTunesAppClass();
      // do something with iTunesApp ....
    }
  }
}

Call C# function in Typescript

overwolf.extensions.current.getExtraObject("myNamespace", (result) => {
        
  if (result.success) {
    pluginInstance = result.object;
    pluginInstance.myFunction(); // Call C# function
  }
}

Error report

ERROR: Error: Failed to execute PauseITunes on AudioController with 0 arguments. details:
System.Reflection.TargetInvocationException: target threw an exception ---> System.IO.FileNotFoundException: Could not load file or assembly 'Interop.iTunesLib, Version=1.13.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies when deploying the application
Where MyNamespace.MyClass.myFunction()

It worked in Windows Form Application, but why does it stop working when I build it into a dll? The error seems to be occurring in the iTunesLib part.

When you call your Generate.dll, did you copied this iTunesLib on the same folder? If not, try to copy this iTunesLib too alongside your Generate.dll and check if this error still occurs — User12345
– User12345, Commented Sep 18, 2023 at 2:42

yolo · Accepted Answer · 2023-09-18 05:19:39Z

0

As Heinz Siahaan said, I was able to solve the problem by placing interop.iTunesLib.dll in the same hierarchy.

Thank you so much.

answered Sep 18, 2023 at 5:19

yolo

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