.NET & C# Bug Fix for Desktop App

I'm having issues with a .NET and C# based desktop application. The executable file is getting hung when running multiple threads, leading to undesired output.

Key issues:
- The application hangs during multi-threading
- Outputs are not as expected

The application primarily interacts with the user interface. The operating system in use is Windows Server.

Ideal candidate:
- Proficient in .NET and C#
- Experienced in debugging multi-threaded desktop applications
- Familiar with Windows Server environment
- Understands user interface interaction in software applications