Decompilers for .NET and Windows (UWP) Apps

I think I’ve been living under a rock as I’ve only just come across dnSpy, a decompiler for .net!

I’ve been building apps and services with .NET for a long time, so a Twitter thread talking about decompilers amused me. David Kean’s comment pretty accurately reflects my sentiment regarding Reflector.

Reflector was such a simple tool and it just worked. That was until Red Gate took over and I can’t even remember what happened to it. Does it still exist?

The thread started with Jared commenting that developers should be using ilSpy instead of hacking with ildasm. I’ve rocked ilSpy in my toolkit for a while now and it’s always served me well. In fact I go so far as to set it as the default file handler for .dll files. After all, what other program are you going to want to launch when you double-click on a .dll file.

dnSpy: A Decompiler for .NET

What really knocked my socks off was that someone mentioned dnSpy which I’d never heard of. Thinking it was something similar to ilspy I didn’t think much of it but figured I would download it and take a look.

Next thing I knew it was like I had opened an entire development environment. The layout was familiar, all the way down to the Debug menu that allows me to attach to process.

What? come again? Attach to Process? Yes, that’s right you can attach to a running process, set breakpoints and intercept exceptions (and I’m sure a whole bunch more things. Ironically whilst I was attempting to modify an image of dnspy running, Paint.NET crashed on me. Whilst Paint.NET was hung, I was able to attach to the process using dnspy and see that it was stuck waiting for a print dialog to return.

dnSpy: a Decompiler for .NET

If you’re using ilspy, you should check out dnspy

For anyone still using ildasm, you should check out ilspy and dnspy

Developers not using a decompiler, what have you been doing? Get yourself a decompiler for .NET, and use either ilspy or dnspy.


Nick Randolph @thenickrandolph
If you need help debugging your application, contact Built to Roam


Where’s the Latest Android Emulator?

Where’s the Latest Android Emulator?

I’ve been struggling to get the Android emulator to perform at a level where debugging was possible. After upgrading to VS15.8 I was able to switch over to use the new Windows Hypervisor support (note that “Windows Hypervisor Platform” is different from the Hyper-V feature in the Windows Features dialog). However, I found that the performance of the emulator was so bad that debugging was barely possible – infinitely worse than when I was using the HAXM support.

After spending a bit of time searching online I came across references to versions of the Android emulator that were higher than what I was using. I double-checked the Android SDK Manager just in case there were updates available but there were none.

Eventually I realised that by selecting the cog in the lower right corner of the SDK Manager I was able to switch from the Microsoft repository across to the Google repository.

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After switching to the Google repository there was indeed an update to the tools, which included the new emulator version.

Did this fix the performance issue? Not entirely. Performance was better in the Android P emulator but still nowhere near as good as a real device (even an old one).

If all else fails, go to the source. I reached out to Miguel and asked if this was a known issue.

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Looks like we need to wait for a Windows update in order to get this performance fix.