Create a Whatsapp Messaging Software in c# windows application

I am looking for a skilled developer to create a Whatsapp messaging software in C# for a Windows application. The software should have the following features:

- Ability to send and receive messages
- Capability to create and manage groups
- Option to send multimedia files

Design Preferences:

- The client has design preferences for the software.

Platforms:

- The software should be compatible with both Windows and Mac OS.

Ideal Skills and Experience:

- Proficiency in C# programming language
- Experience in developing Windows applications
- Knowledge of the Whatsapp API and its messaging capabilities
- Ability to design a user-friendly interface
- Familiarity with both Windows and Mac OS development environments.


I also Have an Referance Software where all the Features are just like i am Expecting it