AutoCAD C# Plugin for Custom Annotation Tools

I'm seeking a C# developer with extensive experience in AutoCAD plugin development. The purpose of this project is to create a plugin that provides custom annotation tools. Specifically, the plugin will need to facilitate the addition of text labels onto drawings.

Key aspects of the project:
- Developing a C# AutoCAD plugin
- Creating custom drawing tools with a focus on annotation tools
- Implementing specific features for adding text labels

Ideal skills and experience:
- Proficient in C# programming
- Extensive experience in AutoCAD and AutoCAD plugin development
- Previous work with creating custom drawing tools
- Strong understanding of annotation tools and their functionalities