The cheatsheet I made are meant for GDScript, but some will still help, like the BBCode ones.
The plugin itself works with any png/jpg, but since it pins images (cheatsheets) ontop of the editor, it might not be useful for programming in CSharp (since you are using an external code editor for CSharp).
You can download the addon and use the free ready-to-go sample collection to quickly test if this is going to help your workflow!!