This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
Visual Studio 2022 Enterprise Edition version 17.5.1
Intellisense and snippets are not working
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 39%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERS%3C/text%3E%3C/svg%3E)
This is a general problem that started with 17.5: intellisense, renaming, underlining all failing; GoToDeclaration etc all much slower. Possibly related to Boost (https://developercommunity.visualstudio.com/t/VS2022-175-C-Intellisense-fails-on-i/10291033?q=intellisense&sort=newest) though difficult to see why such a library should cause such widespread IDE problems. I guess Intellisense relies on an incremental compilation? Unfortunately, 17.5.1 didn't fix any of the problem
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 17%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDO%3C/text%3E%3C/svg%3E)
I've been having this exact problem with a C++ solution since updating to 17.5.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(70.4, 65%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAF%3C/text%3E%3C/svg%3E)
I confirm the same problem for me. Using Boost 1.72, 1.76, 1.81 in different projects via nuget packages from nuget.org. IntelliSense quickly fails on parsing boost headers, and all functionality becomes broken, making VS totally unusable.
Had to rollback to VS2019
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(249.60000000000002, 10%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAX%3C/text%3E%3C/svg%3E)
Hello everyone, please update your VS to the latest version with Visual Studio Installer and check if it works normally.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(19.2, 93%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EN%3C/text%3E%3C/svg%3E)
Same problem here. Not using script manager.
intellisense (eg pressing .) doesn't work on old OR new projects.
I've never heard of 'boost libraries', I'm probably not using them? I do C# 6 MVC and Blazor Server. It's broken in both.
Definitely looks like a problem with the latest update and needs fixing urgently!
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 63%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJH%3C/text%3E%3C/svg%3E)
regularly breaks and doesn't work, just garbage basically
I've been having this problem across 2 different machines for a few months, always updating to latest VS, including right now.Latest update still hasn't fixed it. Intellisense still not working.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 37%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPJ%3C/text%3E%3C/svg%3E)
I'm running 17.7.4 (which is up to date today) and intellisense is not working either. When will this be fixed?????
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(76.8, 87%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELS%3C/text%3E%3C/svg%3E)
I also have issues with Intellisense in the current version of Visual Studio 2022 (17.8.3). It does not display parameters from a '.razor' added after linking to another page, in addition to other behaviors that degrade productivity.
This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Comments have been turned off. Learn more
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 76%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFR%3C/text%3E%3C/svg%3E)
Just had this issue today, all Intellisense was lost but for just one Solution, everything else was fine. Even PC restart did not resolve it.
Closing Visual Studio down, removing .suo and .user files from that project/solution fixed it for me.
Thanks.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 27%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESC%3C/text%3E%3C/svg%3E)
I just delete the .vs folder - works every time.
Hi @MelvynShepherd-9518 ,
Welcome to Microsoft Q&A!
What is your project type? Do you have any error messages or warnings? If possible, please share us more detailed information.
You can restart your VS2022 and create a new project to check if the IntelliSense is working normally.
For more information about IntelliSense, please refer to: IntelliSense in Visual Studio.
Sincerely,
Anna
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
I am working with Blazor Server Apps using .NET 7 and C#
I am checking Intellisense and snippets in a standard class and on Blazor pages created automatically when a new Blazor Web App in created.
The intellisense and snippets work for a new project, but it doesn't work on previously created projects?
I am checking this on two different PCs at the same time, but I am not synchronizing the Account details.
The options settings and the snippet setup are the same on both PC's
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 92%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
Hello,
the intellisense problems have emerged with the 17.5 update and for me it happens for any CMake generated project. Using precompiled headers doesn't change anything. All I can say is that the very first line in each cpp file is being marked with an error message which says that there is a unknown intellisense error.
Since it somewhat works with external includes such as boost (it marks everything with errors though) it appears that intellisense's include analysis is broken.
I've repaired the updated installation and even tried a fresh installation of the whole visual studio suite and everything resulted in these unknown errors.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 79%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPM%3C/text%3E%3C/svg%3E)
Same problem with a fresh new install of 17.5.1 with a simple C++ project (few dozens of files) generated using CMake and using precompiled header.
I spend 3 hours recreating the project, rebuilding everything, triying to understand if there was a faulty file or macro or any invisible character which would crash intellisense, everything without success.
The only solution is to rollback to an older version..
I am working with C#
My main problem is with Blazor Web Apps
If I create a new project, then Intellisense and Snippets work as they should on a Blazor page.
But if I open an old Blazor Web App created prior to upgrading to 17.5 and 17.5.1 the Intellisense and Snippets do not work on a Blazor page, however they do work on any standard classes.
Hello, please close all running VS instances and try to delete the hidden .vs folder in your project folder.
Hi
I did as requested, sorry but this did not make any difference. I also tried it again after rebooting my PC and still no difference.
Deleting the .vs folder didn't fix it for me either. At this point I've re-installed everything and re-generated all projects but the issue persists.
Deleting bin/obj folder, does it work?
It works for new projects but not for previously created projects.
Hi
The project is a C# Web Blazor server .NET 7
The intellisense C++ compiler cannot parse the Boost headers in 17.5. It was not broken in 17.4.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 89%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
https://developercommunity.visualstudio.com/t/IntelliSens-reports-many-errors-for-the-/10287480
There is a workaround posted in that issue and an update has apparently been developed internally and is pending release.
That's great news! And I hope that going forward Microsoft tests Intellesense against the Boost header files before releasing a VS update. This would have saved me about a day of grief.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 44%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Faced with the same problem after updating 17.5.
Confirm that there is a problem only with the projects with inluded Boost libraries, with other ones it works fine