How to fix Visual Studio 2022 17.5 Intellisense not working

MelvynShepherd-9518 296

Visual Studio 2022 Enterprise Edition version 17.5.1

Intellisense and snippets are not working

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Richard Shepherd 85 Reputation points

2023-03-06T21:41:58.1566667+00:00

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
David O 50 Reputation points

2023-03-09T21:16:18.44+00:00

I've been having this exact problem with a C++ solution since updating to 17.5.
Alexander Filonov 30 Reputation points

2023-03-13T10:02:31.91+00:00

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
Anna Xiu-MSFT 31,196 Reputation points Microsoft External Staff

2023-03-30T02:45:17.0166667+00:00

Hello everyone, please update your VS to the latest version with Visual Studio Installer and check if it works normally.
niico 55 Reputation points

2023-04-20T17:23:00.11+00:00

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!
Joe Hajek 5 Reputation points

2023-05-18T18:59:59.91+00:00

regularly breaks and doesn't work, just garbage basically
Pacôme Danhiez 15 Reputation points

2023-06-04T15:03:25.6566667+00:00

Still not working with version 17.6 ……

I am stuck to version 17.4 for few months now.

please fix it,
niico 55 Reputation points

2023-07-11T21:13:08.7733333+00:00

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.
Palmer, Jared L 41 Reputation points

2023-09-29T14:31:05.3233333+00:00

I'm running 17.7.4 (which is up to date today) and intellisense is not working either. When will this be fixed?????
Licitec Software 0 Reputation points

2023-12-27T16:53:13.9066667+00:00

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.
Sebastian Tobiasz 0 Reputation points

2025-03-12T11:59:06.9266667+00:00

same here, I've got 17.13.2 and it broke recently, any news how to fix it. Used copilot to give me any troubleshooting steps but nothing worked.
Sebastian Tobiasz 0 Reputation points

2025-03-12T13:09:31.9766667+00:00

update to 17.13.3 fixed the issue
Akash Singh 0 Reputation points

2025-09-15T10:08:02.52+00:00

Update extension for that particular programing language or press control+space for trigger mannual suggestion
Hill Wang 0 Reputation points

2025-12-30T08:27:59.91+00:00

I have both VS 2019 and VS 2022 installed on my computer. In VS 2022, there is no auto-completion or prompt functionality for all *.razor files.

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12 additional answers

Mattias Besemann 80 Reputation points

2023-10-31T20:35:14.4666667+00:00

In VS 17.7.6 IntelliSense is not triggering with a period, but it's still possible to trigger it by using Control + Space or Control + J.

EDIT: Wow I just realized somehow these 2 settings were unchecked (Options -> Text Editor -> C# -> General):

Everything is working again - replace C# with your language of choice.
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10+ people found this answer helpful.
Richie 0 Reputation points

2023-11-03T13:25:06.22+00:00

This solved the problem for me. THANK YOU!

PeterB 10 Reputation points

2023-12-07T10:52:42.29+00:00

Justy installed 17.8.3, me advocator of writing intellisense.. I'm stuck.
Visual Code seams to work fine on this C#8 project
Though the payed version Visual Studio doesnt

Tried recreate database but no luck

(searched for reacreate database found it under c/c++ advanced settings and enable it )

Tomáš Prokop 0 Reputation points

2024-01-15T14:56:48.8666667+00:00

Thank you so much.

userblueone 0 Reputation points

2024-01-25T00:20:04.03+00:00

The newest version as of 1/24/2024 and this still is the solution.

PeterB 10 Reputation points

2024-01-25T10:50:03.96+00:00

I had reported a bug like this, one cannot open a folder (instead of a .sln, which is a new option in Visual Studio) and have IntelliSense. The complaint about it was somehow refused, and the case closed (to my amazement) , so the support is maybe not that good, though the language C# is..

In my case i opened as folder as there were multiple projects inside the Git Branche side by side. (no .sln) Just as one would with VSCODE (.csprj) and vscode doesnt have this problem.
I kinda wonder the future for visual studio.. perhaps it had its best year and VScode takes over, or we see some late fix for this VSstudio 2025 or Visual Studio 2028 or so ;)

Their support also seen with other cases (around copilot) isnt just what it used to be.

userblueone 0 Reputation points

2024-01-28T12:06:08.9466667+00:00

After I had run a repair it still did not work. Then after I uninstalled and reinstalled it did not work. The answer by Mattias is correct. You would think that these options would be on by default.

Aaron Kiander 20 Reputation points

2024-02-26T21:56:45.6233333+00:00

This fixed my issue thank you!

Rory Scanlan 0 Reputation points

2024-10-15T08:32:18.96+00:00

Still broken after update, this fixed it for me. Not sure how these options where disabled.

mwf 20 Reputation points

2025-07-02T09:04:18.9833333+00:00

~~17.14.7 and it's happening again. I would appreciate a more reliable experience.
~~
Apologies. After updating to the latest version, clearing the .vs folder, and manually deleting the component cache (I wish I could do this within Visual Studio), the project settings defaulted to an “Any” architecture that wasn’t properly configured. Only after rebuilding did I notice the errors stoped Intellisense from working, too many errors.
Fawad Raza 10 Reputation points

2023-12-11T17:37:49.7166667+00:00

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.
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2 people found this answer helpful.

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Steve Carley 5 Reputation points

2023-12-11T18:09:12.54+00:00

I just delete the .vs folder - works every time.
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1 person found this answer helpful.
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PeterB 10 Reputation points

2024-01-25T10:51:23.8733333+00:00

its a sign all those deleted comments...
Anna Xiu-MSFT 31,196 Reputation points Microsoft External Staff

2023-03-02T02:30:57.11+00:00

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

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MelvynShepherd-9518 296 Reputation points

2023-03-02T13:10:47.4633333+00:00

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

Michel 25 Reputation points

2023-03-02T19:21:23.3033333+00:00

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.

Pacôme Danhiez 15 Reputation points

2023-03-02T22:57:37.3266667+00:00

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..

MelvynShepherd-9518 296 Reputation points

2023-03-03T10:15:24.77+00:00

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.

Anna Xiu-MSFT 31,196 Reputation points Microsoft External Staff

2023-03-03T10:16:53.6566667+00:00

Hello, please close all running VS instances and try to delete the hidden .vs folder in your project folder.

MelvynShepherd-9518 296 Reputation points

2023-03-03T10:46:51.5066667+00:00

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.

Michel 25 Reputation points

2023-03-03T11:49:52.8133333+00:00

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.

Anna Xiu-MSFT 31,196 Reputation points Microsoft External Staff

2023-03-07T10:25:59.0833333+00:00

Deleting bin/obj folder, does it work?

MelvynShepherd-9518 296 Reputation points

2023-03-07T11:41:56.6833333+00:00

It works for new projects but not for previously created projects.

MelvynShepherd-9518 296 Reputation points

2023-03-07T14:23:11.32+00:00

Deleting the bin and obj folders made no difference

MelvynShepherd-9518 296 Reputation points

2023-03-13T10:33:28.1166667+00:00

It works for new projects but not for previously created projects.

MelvynShepherd-9518 296 Reputation points

2023-03-13T10:34:42.13+00:00

Hi

The project is a C# Web Blazor server .NET 7

David O 50 Reputation points

2023-03-13T15:28:33.1033333+00:00

The intellisense C++ compiler cannot parse the Boost headers in 17.5. It was not broken in 17.4.

David O 50 Reputation points

2023-03-13T15:33:26.1066667+00:00

It did not work in new C++ projects for me, nor did deleting the bin and obj folders.

Anonymous

2023-03-14T11:01:25.5366667+00:00

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

Tim 0 Reputation points

2023-03-14T12:35:03.46+00:00

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.

David O 50 Reputation points

2023-03-14T15:33:45.91+00:00

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.

PCz 10 Reputation points

2023-03-15T11:25:02.7733333+00:00

Hello,

I confirm the same problem. Boost libraries includes generaring problem since VS 2022 17.5 and continue with 17.5.2 and 17.5.2. For VS 2022 17.4.x worked fine. Latest BOOSt 1.81 in use, also checked on 1.78 - the same behaviour.

Multiple errors in detected in boost concpt_check.hpp causes Intellisense stop working however the user code compiles and generates all outputs correctly.

Rafał Skowroński 0 Reputation points

2023-03-16T12:57:46.23+00:00

well, well, dear Microsoft! We've updated to latest version and now InteliSense down entirely.. please advise our effectiveness dropped dramatically..

https://learn.microsoft.com/en-us/answers/questions/1185434/how-to-fix-visual-studio-2022-17-5-intellisense-no

While we do use Boost, we've got none of its files opened etc.

Parsing of any file is so slow it seems to take minutes for a single file and then InteliSense is not available even for language intrinsic constructs!

Dmitry Gorelov 0 Reputation points

2023-03-17T13:00:15.8933333+00:00

I confirm the problem. The work is hell when Intellisense not working.

Completely the same sympthoms as the colleagues have reported above with the screenshots.

Dear Micrsoft. Could you please stop asking the same questions and JUST open VS2022, add Boost to the project and reproduce the problem??

Tú Nguyễn Mạnh 0 Reputation points

2023-03-24T02:55:56.9233333+00:00

I have similiar problem with normal AspNetCore MVC project. Can easily reproduce with simple steps:

create new project AspnetCore MVC

add code declare simple class javascript into wwwroot/js/site.js file, like

class RectangleP { constructor(height, width) { this.height = height; this.width = width; } }

in Index.cshtml file, try to declare a js variable use above class.

Can see the intelisence work well.

Close all file, close VS and reopen project

now back to work with js variable in index.cshtml file, no intelisen work.

I updated to latest VS2022 (17.5.3) and see that it isn't fixed.

Alex Shnaiderman 0 Reputation points

2023-03-30T09:44:47.3666667+00:00

I solved it ( at least for now ) by upgrading from version 17.5 to 17.5.3

tstrong 90 Reputation points

2023-03-31T17:53:17.25+00:00

You may be experiencing this problem if you are using ScriptManager to add bootstrap to your site. Try adding bootstrap as a link in the <head> of the page or masterpage.

example: <link href="./Content/bootstrap.css" rel="stylesheet" type="text/css" />

Andrew Flynn 0 Reputation points

2023-04-08T18:07:33.14+00:00

I fixed this issue for version by doing the follwing: 17.5.3 Tools > Options > type "intellisense" in the top left search box, >find the correct language intellisense settings > uncheck and recheck the required settings >click OK

Michael Coffey 1 Reputation point

2023-05-18T15:40:46.8866667+00:00

I'm not using ScriptManager or bootstrap. I just upgraded to 17.6. Intellisense helper not showing anymore. "Intellicode" is working.

Fabio Giacomelli 6 Reputation points

2023-05-24T17:20:12.51+00:00

Same problem for me, intellisense is broken on XAML files in MAUI project. I'm using the 17.6.1 version. In the previous version it worked.

I tried to reinstall a fresh version, deleting .vs folder, close all the tabs, rebuild, but at this time is not solved

Michael Coffey 1 Reputation point

2023-05-24T17:29:04.5266667+00:00

I found this here which worked for me:

I was able to resolve this by going to Tools > Options > Text Editor > All Languages > General and enabling the Statement Completion > Auto List Members. For some reason unknown to me, mine got turned to the intermediate state.

Fabio Giacomelli 6 Reputation points

2023-05-24T19:46:44.2233333+00:00

does not work for me

Bohumil Mička 0 Reputation points

2023-05-30T06:00:02.3233333+00:00

The same problem is in editing XAML, WPF. There is none any bootstrap in xaml. Does exist alternative to VS?

Bohumil Mička 0 Reputation points

2023-05-30T06:01:20.8133333+00:00

Test, prev message was lost because of Microsoft server error. I cannot believe. Error, error, error, errror.

Bohumil Mička 0 Reputation points

2023-05-30T06:02:10.2633333+00:00

A server-side error occurred

David Sanchez 0 Reputation points

2023-06-04T14:35:59.5566667+00:00

When will the next fix for something that worked be released with understanding that there may be a chance of the same song with a different feature.

niico 55 Reputation points

2023-06-25T14:54:07.4933333+00:00

I'm experiencing this in a project I created a week ago from the standard VS templates for Blazor Server

Mohamed Ali 0 Reputation points

2023-07-03T02:48:38.2533333+00:00

I have the same problem with 17.6.4, I have no fix with that
1 workaround though is to try the preview 17.7.0 preview 2.0 seems to work fine

Steve Carley 5 Reputation points

2023-07-06T22:15:54.63+00:00

I have the same problem with 17.6.4.

Steve Carley 5 Reputation points

2023-07-06T22:17:13.6366667+00:00

Code lens is also broken

dusty bedford 0 Reputation points

2023-07-09T17:38:10.8+00:00

When is this going to be fixed? Never?

Stephen Miller 0 Reputation points

2023-07-13T21:20:41.2933333+00:00

I have the problem, as well. It is only in the xaml editor... C# code does show intellisense fine...

Asbjørn Engås 5 Reputation points

2023-09-09T12:40:34.11+00:00

I have this problem in Visual Studio 17.7.3. Intellisense is not showing up in the XAML-editor in MAUI projects. But it does work in the C# editor.

Any fixes for this planned soon?

Steiner Thomas 0 Reputation points

2023-09-22T07:57:54.43+00:00

Still not working for 17.7.4...

Steiner Thomas 0 Reputation points

2023-09-22T08:33:28.8066667+00:00

I reported an issue: https://developercommunity.visualstudio.com/t/Linux-Remote-headers:-Intellisense-not-w/10473415

John Hollowell 0 Reputation points

2024-01-17T19:40:56.8833333+00:00

Updated to Visual Studio 2022 version 17.8.4 but IntelliSense still doesn't work and the text colors in the editor are messed up. I don't use Boost.

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How to fix Visual Studio 2022 17.5 Intellisense not working

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