.NET Reflector Visual Studio Extension

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Integrates .NET Reflector into Visual Studio to allow you to seamlessly debug into third-party code and assemblies, even if you don't have the source code for them. Visit www.reflector.net for more information. Copyright (c) 2009-2015 Red Gate Software Inc.

(24) Review
Visual Studio
2013, 2012, 2010, 14
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Reviews (24)
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by Yatajga | January 02 2015

by Luty1 | August 06 2014

It could be usefull if there wasnt the crash problem. I am using the last build (, but it still crashing VS2013.

by MGMST | February 11 2014

This shit crashes VS2010 in debug time. I spend a day looking what is wrong until removed it. Shame!

by Senthamil | January 15 2014


by jasonaughton | January 06 2014

Was a great tool until the most recent update ( which has broken debugging in Visual Studio 12. I trust this will be fixed for a future release.

Red Gate January 28 2014
| Edit |

Sorry about this problem - it was fixed in version, which you can get download from this page.

by Andrey_F | December 31 2013

This tool is indispensable when you need to debug third-party assemblies.

by Dennis Wanke | December 29 2013

The only thing that is really helpful and which free tools don’t offer is the ability to debug an assembly with no PDB provided. However, Red Gate did manage to break even this only good thing with the recent update, making debugging in VS 2012 nearly impossible (extremely slow and unstable) even with no decompiled assemblies at all: http://forums.reflector.net/questions/4642/vs-debugger-extremely-slow-after-the-latest-update.html Besides that, the product has ZERO support and no ability to roll back to a previous (minor) release. In fact, there is even no such thing as a release archive. At least it is not discoverable on their AWFUL web site - just look on THAT: http://documentation.red-gate.com/display/REF8/.NET+Reflector+8+documentation (they call it “Support”, as it states on the main product page: http://www.red-gate.com/products/dotnet-development/reflector). Apparently, Red Gate concentrates all the efforts on stuffing Reflector full with bells & whistles instead of to ensure the most (and only) helpful functions just really work.

by codeguardian7 | December 26 2013

Great tool; I'd give it a 5-stars rating if it wasn't the latest exception that occurs in VS 2012 and forces the IDE to exit altogether!!! Disabling the extension fixes the issues... Please help.

by mohammed.farouk | November 17 2013

by mjvh80_ | July 25 2013

Simply doesn't work for me. Double clicking on the call stack doesn't do anything. Not worth it, should work out of the box.

by Carsten Siemens | April 27 2013

A great tool!

by Waqas M | February 08 2013

Good tool

by Peng C | February 07 2013

.NET Reflector Visual Studio Extension v7.0 or later installed, Visual studio 2010 SP1 often no response

by offler666 | January 25 2013

I liked the tool as it was a free one by Lutz Roeder. Nowadays I would not pay for It, as the benefit to free tools (JustDecompile, CodeReflect, ...) is to marginal for me.

by Mads Kristensen | November 28 2012

by BobT36 | September 28 2012

Wow I knew you could de-compile .dlls and things to an extent, as in get a basic list of the procedure calls and references, but the depth of this blows my mind. Never thought you'd be able to de-compile and see the EXACT code right there. Granted it isn't AS nice as working with it in your own solution, but wow it is certainly helpful to see what exactly is happening behind the scenes. Great for debugging 3rd party .dlls that just return a "No" when something's not working, and a godsend for retrieving some code from .exes where a dev hadn't backed up the source. Also nice to see how Microsoft does things when you're making calls to the framework components.

My only real grump so far is the tiny "Trial" notice at the top left of this page, there should really be a notice in bold at the top of the description that this is a 14 day trial, and you'll need to buy it for £120 at the website. Fantastic addon though.

by Đonny | September 20 2012

by veljkoz | August 21 2012

There are quite a few decompilers out there, but I think this is the only one that allows you to debug 3rd party dll's at runtime (given they aren't obfuscated...) - you can go step by step, step into, and everything else, just like it's your own code (it creates a debuggable clone of the assembly that enables this). This is very powerful option, but, having said that, it doesn't work quite nicely. The code it displays as "current execution line" isn't the one that's executed (like when you get when source code differs from debugging exe/pdb, when code is optimized etc), so you always have to look e.g. 7 lines above the currently displayed to see where he's at. Furthermore, it breaks in files where there's no break but it's breaking there just because they're calling the line in a file that has it. It's all minor issues, but mighty annoying at that... some assemblies might work without issue, mine haven't :)
All in all - an excellent decompiler, but that needs a few enhancements of the more advanced features.

by FranzVienna | July 26 2012

Since version 7.6 the installation for Visual Studio 2010 fails with the error message "The specified path, file name, or both are too long. The fully qualified file name must be less then 260 characters, and the directory name must be less than 248 characters."

Furthermore the menu items Tools>Visual Studio and Windows Integration (Ctrl+I) vanished.

Red Gate August 03 2012
| Edit |

Ah, yes - that's a broad issue that hits a few VS Extensions. We're aware of that error and working on get it cleared up.

And the integration options have been split (as of 7.6) to make sure there's no control inter-dependancy. The Windows integration function is now under Tools>Options, and the Visual Studio integration can be handled via the installer. If you're still having trouble with it, drop a note in the discussion tab and we'd be happy to help work it out.

by Ramana Nagineni | July 10 2012

Great tool to debug 3rd party dlls.

Red Gate July 11 2012
| Edit |

Really glad you like the tool, Ramana - thanks for the feedback!

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  • Are Windows RT assemblies supported?
    2 Posts | Last post January 28, 2015
    • Is it possible with the extension to work with Windows RT solutions?
    • Hi Carl,
      Thanks for your post!
      There's no specific support that was added for debugging WinRT solutions, though .NET Reflector will still work with them, at least for debugging into any standard managed DLLs that are referenced and used by the solution. 
      However, there are known issues with metadata files (.winmd), including the "Windows 8.x" reference of any WinRT solution. Reflector is unfortunately unable to decompile and debug into these. (There is a bug though that will still offer the option to enable debugging on winmd files even though the request will fail--apologies for any confusion caused by this!)
  • VS Open in .NET Reflector Desktop does not work as expected
    3 Posts | Last post October 20, 2014
    • Hello!
      I'm using .NET Reflector and ReSharper and have source server support enabled.
      Now, when I use "Open in .NET Reflector Desktop" ReSharper starts to download the PDBs and when that's done, Reflector says there is already source code on my system and opens that one in VS Studio. That is not what I would expect from a menu option labeled "Open in .NET Reflector Desktop". Please provide a separate option that will always open the specified member in .NET Reflector.
      Many thanks, Michael
    • Thanks Michael! I've logged this as RP-3702.
    • Great, thanks!
      Best regards, Michael
  • Catastrophic Failure when debugging IISExpress
    3 Posts | Last post October 20, 2014
    • Hello!
      I've found an issue that I could reproduce on both machines on which I tested this:
      VS 2013
      Windows 8.1
      Debug Just My Code is diabled.
      When I try to attach Visual Studio debugger to the already running IISExpress process, I receive "Unable to attach to the process. Catastrophic Failure". By trial and error I finally figured out that it is related to Reflector. If the add in is disabled, attaching works.
      Further analysis shows that if I set the "Just my Code" flag, attaching will work. Same goes for attaching to an IISExpress process that was previously attached to with a debugger.
      Also, starting via "Debug > Start new instance" works, but of course, that's not the same as attaching to a running process. 
      I'm guessing that Reflector is doing something (or trying to) with the jitted code of IISExpress or the .NET Framework assemblies that won't work if the process is already running. Could you please fix this issue because working around it is a real hassle. 
      To me, personally, it would be okay, if the .NET Reflector addIn would offer separate options for enabling VS-Go-To-Reflector and Debugger Integration because I actually usually only need the first one.
      Best regards, Michael
    • Hi Michael,
      Thanks for your post and sorry to hear you're running into issues with Reflector!
      I tried reproducing this with the specs and steps you provided but haven't been able to yet, I'm afraid.
      There weren't any major changes with version 8.4 (it mainly added VS2014 support) but in case something about that version is conflicting with your machines or VS installs, can you please try reinstalling v8.3 to see if the problem persists? ftp://ftp.red-gate.com/ReflectorInstaller.zip
      Can I also just check--does this happen with any application running in IIS Express?
      And regarding the separate options, we used to offer different editions of Reflector that did this--I'll pass on your feedback that you'd like to bring that back. :)
      Kind regards,
    • Hello Jessica!
      Your idea with the different applications was spot on. It literally only happens when one particular page of my application was the last page processed by IIS Express right before I attach the debugger. Unfortunately, that page was also the one I most often try to debug so it never popped up anywhere else. 
      Version 8.3 and 8.4 don't make a difference. I did notice though, that version 8.4 still identifies itself as 8.3 in the isntaller and the Programs Window. Looks like a missed version number in the installer to me.
      Anyhow, I'll keep an eye out for the issue and if I manage to triage it into a simple repro-case, I'll get back to you with it. For now, I'll just have to remember to do a different request before starting the debugger. No biggie.
      Best regards, Michael
  • After only one use I have to reinstall Windows completly!
    2 Posts | Last post April 30, 2014
    • After using it only one time - (a) install, (b) checking out functionalities, and (c) deinstallating - it was not possible to use Windows SDK again. 
      Installing of Visual Studio 2012 failed, because of the fact .Net is not installed, BUT IT IS!
      Installing of Visual Studio 2013 failed, because of the fact .Net is not installed, BUT IT IS!
      I guess that this .Net Reflector has changed pathes in the registry or some assemblies which make it not possible to develop any Windows application which are using .Net!!! It's a shame! 
      Never again!
    • Hi there,
      So sorry for all this trouble .NET Reflector caused!
      From your trial, do you recall if you enabled debugging on a framework assembly that required .NET Reflector to alter your DEVPATH? It sounds like the DEVPATH was altered but may not have been reset after your debugging session. 
      (Reflector needs to alter the DEVPATH when you enable enable debugging on a assembly that doesn't have a debugging signature. Reflector will make a copy of the assembly with the added signature and place it in the Reflector DEVPATH folder. If you don't "reset the DEVPATH" after debugging, any program that uses that assembly will continue trying to load that edited assembly from the DEVPATH folder, although .NET Reflector likely already deleted it after debugging was finished.)
      I know you've already reinstalled Windows now (so sorry again for this inconvenience), but in case you ever give Reflector another try and run into this issue again, you can reset the DEVPATH from the VS menu (.NET Reflector > Reset the DEVPATH). 
      Or if in any case you've gotten rid of the DEVPATH environment variable, you can instead go into the Reflector distribution directory and run "RedGate.Reflector.DevPathSetter.exe /reset"
      Again, my apologies that we weren't able to help with this issue in time.
  • Crashes in VS2012 when closing solution
    1 Posts | Last post February 12, 2014
    • Lately (possibly after updating to, VS 2012 crashes when closing a solution.  I found the stack trace:
      2/12/2014 8:35:32 AM
      System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
         at RedGate.Reflector.VsPackage.Gui.RobToolWindow.()
         --- End of inner exception stack trace ---
         at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
         at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
         at System.Delegate.DynamicInvokeImpl(Object[] args)
         at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
         at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
         at System.Windows.Threading.DispatcherOperation.InvokeImpl()
         at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
         at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
         at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
         at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
         at System.Windows.Threading.DispatcherOperation.Invoke()
         at System.Windows.Threading.Dispatcher.ProcessQueue()
         at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
         at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
  • Video Missing
    3 Posts | Last post January 30, 2014
    • The Demo Video from the Description tab goes to a YouTube page that says the video is unavailable.
    • Sorry about that! You can find the overview and a few other helpful .NET Reflector videos here: http://www.youtube.com/playlist?list=PLhFdCK734P8DBbSTNLHOYS0zBIh9BQ9Vu
    • This is fixed now. Thanks for bringing it to our attention! :)
  • C# code
    2 Posts | Last post January 15, 2014
    • Some time if I try to open an Assembly with 20+ classes it takes more time and could not able to get the C# code. Do I try reinstalling it?
    • Hi there,
      Just to confirm I'm understanding correctly, is .NET Reflector slow while you're navigating through the code via the Reflector Object Browser or is it just slow when you actually try to decompile the code (or both)?
      Does it crash or hanging Visual Studio at all?
  • Invalid certificate and XP problems
    3 Posts | Last post July 29, 2013
    • The current version cannot install on XP due to too-long-paths. It also says that the certificate is invalid but that could be a side-effect of the same problem.
      FWIW it's possible to install the extension by renaming the .vsix to .zip, unpacking it and removing all the subfolders (only used for the certificate and signing info), then re-zipping and renaming back to .vsix.
    • That's pretty much the truth - Windows is still bound to MSDOS and its' 256-character file path limitation. NTFS supports up to 32,000 character filenames, but the path has to be in a special UNC format and most programs aren't aware of how to handle that style of path.
      You may use your workaround or I hear there are some third-party solutions out there to intercept and prevent this sort of thing.
    • That's right. The certificat has expired and the Extensions Manager denies installing the update on my VS2010 (Windows 7 x64 OS). RedGate should re-sign the update with the valid certificate and re-issue it.
  • Visual Studio 2013 support
    1 Posts | Last post July 03, 2013
    • Hopefully support for Visual Studio 2013 is coming soon, as I really need it.
  • where are the release notes?
    2 Posts | Last post February 20, 2013
    • Where are the release notes for v8.0.2.313 (and incidentally the earlier versions too)?
      For obvious reasons, a link on this page to the release notes would be useful (not to mention professional).
    • You can find the release notes for version on the page below:
      There are also links to earlier version release notes on the page.