无法使用 Class 库加载文件或程序集 C# 控制台应用程序

Question

I've created a Class Library in C# .Net Framework 4.8 , and in the solution I've also included a Console Application , same target. I'm running both in a x64 configuration. No errors on build.

I referenced the App in the Library , and when I run a Button in a Form in the Class Library I'm getting an error:

System.IO.FileNotFoundException: Could not load file or assembly 'ExampleApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. File name: 'ExampleApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

I've combed the inte.net and SO for a solution. I tried repairing Visual Studio, I tried deleting the .vs folder in the projects, I tried things like:

solution 1 and solution 2

I seriously tried everything I could think of. It has to be something to do with the.dll dependencies imho, because the only one that my ExampleApp is using is the Microsoft.CognitiveServices.Speech reference which I installed via NugetPackage in my solution.

No idea how to debug this further or get a proper trace stack from this error...

Any ideas on how to proceed?

Thanks

Answer 1

Solved by changing the.dll's Copy Local property to True

Answer 2

Exactly @Yafim Simanovsky, I solved also my problem by changed <Private> flag to True.

My problem (“Could not load file or assembly…”) was with new Designer 'WpfSurface.exe' from VS 2022, which after changing the reference tags 'Private' to True, was able to copied all dependent.dll files to Cache.