ilspy (deprecated)

Install command: 
brew install --cask ilspy

Name: ILSpy

Avalonia-based .NET decompiler

https://github.com/icsharpcode/AvaloniaILSpy

Cask JSON API: /api/cask/ilspy.json

Cask code: ilspy.rb on GitHub

Current version: 7.2-rc

Requirements: macOS >= 10.15

Versions:

Intel tahoe 7.2-rc
sequoia 7.2-rc
sonoma 7.2-rc
ventura 7.2-rc
monterey 7.2-rc
big sur 7.2-rc
catalina 7.2-rc

Analytics:

Installs (30 days)
ilspy 206
Installs (90 days)
ilspy 656
Installs (365 days)
ilspy 2,522