You can install the extension in Visual Studio Code via the marketplace

The extension consists of two parts: The VSCode extension itself (written in TypeScript) and a "backend" server process (written in C#), which provides a bridge to ILSpy functionality.

If first time

npm i vsce -g

Compile and package all parts:

./build vsix

An installable .vsix file should be generated in vscode-extension folder, if everything is fine.

Compile only backend server from console:

./build backend

Or open backend/ILSpy-server.sln in Visual Studio 2019 (>= 16.9) or another .NET IDE.

Compile VSCode extension itself:

./build CompileExtension
./build TestExtension

To develop and debug the VSCode extension, install Visual Studio Code, then run

cd vscode-extension
code .