ILSpy - .NET Decompiler

Mind to epxand what you consider "better"? Either here is fine or even more directly in a GH issue in our repo, we always want to get better.

In Bart De Smet's #AzureDevSummit talk "Adding a new Language Feature to C# in 60 minutes" #ILSpy is a "supporting actor". Video www.youtube.com/watch?v=GnZW... and Gist gist.github.com/bartdesmet/d...

Extension Everything Under the Covers by the ILSpy maintainers, Tue, Feb 24, 2026, 6:00 PM | Meetup The .NET Stammtisch Linz Meetup is back! **What to expect:** 🗣️ Top speaker with an interesting topic 👥 Meet old and new friends from the community 🍕 Free food 🎉 Open-

If you happen to be able to make to Linz, Austria on the 24th of February, please join us in-person for "Extension Everything Under the Covers" www.meetup.com/net-stammtis... #dotnet

Release 0.23.0 · icsharpcode/ilspy-vscode New Features Upgrade to ICSharpCode.Decompiler 10.0 Preview 2 (see release notes for ILSpy 10.0 Preview 2 to get more details) Support for analyzing NuGet packages (add to assembly tree, browse co...

The #code extension has been updated to #ILSpy 10 preview2 as well, and comes with support for NuGet packages, drag&drop and more! github.com/icsharpcode/... (installable via Visual Studio Marketplace & Open-VSIX)

Release ILSpy 10.0 Preview 2 · icsharpcode/ILSpy This preview release is based on .NET 10.0. Please make sure that you have it installed on your machine beforehand. New Language Features Update pattern detection to Roslyn 5.0 RTM C# 13: allows r...

Based on the RTMs of #dotnet 10 and #Roslyn 5, we did manage to wedge in #ILSpy 10 preview 2 before the end of the year! Grab the detailed news and bits at github.com/icsharpcode/...

Release 0.22.0 · icsharpcode/ilspy-vscode New Features Support decompilation of .NET-compiled .wasm files Introduce "Base Types" and "Derived Types" elements for type nodes in tree (works similarly to ILSpy stand-alone application) (#563)...

The #ILSpy #vscode extension marketplace.visualstudio.com/items?itemNa... adds new features in 0.22 from our xplat efforts, details github.com/icsharpcode/...

A #csharp 14.0 feature to expect in the next #ILSpy preview for #dotnet 10 is extension members (not final, see github.com/icsharpcode/...)

IF you rock .NET 10.0 already, here github.com/icsharpcode/... is #ILSpy 10.0 Preview 1 that actually is built for #dotnet 10.0. Check out API diff - a description can be found in github.com/icsharpcode/...

We have archived the AvaloniaILSpy repository. Please use the #vscode extension marketplace.visualstudio.com/items?itemNa... which these days supports more features from WPF/Windows #ILSpy github.com/icsharpcode/... anyways.

Our #vscode extension got the #ILSpy 9.1 "treatment" as a precursor to more feature-rich releases in the future marketplace.visualstudio.com/items/icshar...

Speaking of "supporting actor" - #ILSpy in @david.wengier.com talk "What's Inside: A .NET assembly! (and how does Hot Reload change it?)" www.youtube.com/watch?v=Buxm...

Being a "supporting actor" in a talk is always nice to see - @chrisnas.bsky.social‬ on String and memory #UpdateConference #UCK25 #krakow #dotnet

PSA - #VisualStudio 17.14 ships with #ILSpy 8.2 (ICSharpCode.Decompiler 8.2.0.7535 to be precise)

Release ILSpy 9.1 · icsharpcode/ILSpy ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0.x or later must be installed prior to starting ILSpy. Note t...

Point Release Alert - github.com/icsharpcode/... has been released! #ILSpy 9.1 now executes on runtimes 8+, and comes with a nice amount of enhancements +bunch of bug fixes.

Release 0.20 · icsharpcode/ilspy-vscode New Features Introduction of "Analyze" feature similar to ILSpy desktop application: You can analyze where a method is called, a type is used or an interface is implemented. See Wiki for a descrip...

Our #vscode extension has been updated to #ILSpy 9 and now also supports analyzers. Release details at github.com/icsharpcode/..., install via marketplace.visualstudio.com/items?itemNa...

Are we there yet <g />? Would you mind sharing what sort of problems you are fighting?

yield-return decompiler failed · Issue #3400 · icsharpcode/ILSpy Original: public static IEnumerable<int> Enumerate() { for (int i = 0; i < 10; i++) { int result; try { result = DateTime.Now.Second; } catch { continue; } yield return result; } } ILSpy: [Iterator...

@jaredpar.bsky.social Why is Roslyn 4.13 MIA? We already got a few issue reports for decompiling learn.microsoft.com/en-us/dotnet... but can't start fixing until we actually have the respective Roslyn available to us github.com/icsharpcode/...

Release ILSpy 9.0 · icsharpcode/ILSpy ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0.x or later must be installed prior to starting ILSpy. Generi...

The #ILSpy 9.0 decompiler has shipped! x/arm64 Bits are up on GH (zip, installer), #VisualStudio gallery, ilspycmd #dotnet tool and of course our nupkgs (Decompiler, BamlDecompiler, ILSpyX). An amalgamation of the release notes of the three previews and RC is available at github.com/icsharpcode/...

This project needs maintainers

It's Release Candidate time! #ILSpy 9 is on the home stretch, grab the latest bits at github.com/icsharpcode/.... One big new feature made it into the RC - diagramming github.com/icsharpcode/...

You might be wondering what is the difference between our bsky and hachyderm.io/@ilspy accounts? The latter is "channel 9 from the cockpit" (or chatter from the engine room) with more details about the development of ILSpy vs more informational/support style of posts on bsky.

Release ILSpy 9.0 Preview 3 · icsharpcode/ILSpy ILSpy 9.x is based on .NET 8.0. All artifacts except the self-contained distribution are built framework-dependent, which means .NET 8.0 must be installed prior to starting ILSpy. Breaking Changes ...

ILSpy 9.0 Preview 3 is finally here! You will notice a really huge batch of changes in our UI projects contributed by Tom Englert (of TomsToolbox.* fame), who is helping us modernize our WPF-based UI. Yes, there is also language goodness, for details & bits go to github.com/icsharpcode/...

Coming soon - ILSpy 9.0 Preview 3!