Creating a CompletionProvider to provide additional intellisense items while editing code.

CompletionProviders are IDE extensions that provide completion items in the intellisense list when user is editing code in the Visual Studio IDE:

The preceding screenshot shows a completion list with all the accessible instance members from the current type and base types, and is generally shown when the user types this. inside executable code. Users can hit a commit character, such as Enter key, to invoke auto-complete with the chosen member.

In this section, we will write a CompletionProvider to provide the same accessible members completion items, but without requiring the user to have typed a this before a . character (yay! from all the lazy folks like me). Additionally, when invoked within a static method, the completion provider will provide only static accessible members in the completion list.

Getting ready

You will need to have Visual Studio 2017 installed on your machine to execute the recipes...