Why does intellisense and code suggestion stop working when Visual Studio is open

Question

I have been having issues with Intellisense in Microsoft Visual Studio 2012  I will be working in a project  editing code and whatnot  after a period of time  anywhere from 5 nbsp minutes to over an hour  and all of a sudden  no more code suggestions or intellisense  Both seem to stop working completely at the same time   The only solution that I have tried is to reset all my settings  close out of Visual Studio completely and reopen the project again  Is there a better solution or an update that will fix this

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TonyL s answer didn t work for me  but I noticed Intellisense stopped working in the foo class after I changed the method signature in the bar class   Closing and reopening the foo cs file fixed it

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I was facing this problem in  Visual Studio 2015   C     After a while  I solved this way    1  To go  Tools -  Options -  Text Editor -  C    2  Check these options  Auto list members  and  Enable virtual space     Probably  some extensions  like R   disable these options for use their tools

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I found a solution that works for me 100  of the time  I do not have ReSharper installed   Pressing Refresh in Solution Explorer makes IntelliSense come back

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im currently watching a MVA python tutorial on youtube and noticed my intellisence had also disappeared  soon after they expalined why   something along the lines of this  excuse my lack of proper coding vocabulary i am new to programming but i have found the solution     Answer    Visual studio can not always guess what you are trying to input - therefore it does not always realise that it needs to give you a hint  for example if you are trying to use a string within a variable and need intellisense to give you options for that strings content  you must sometime tell visual studio that this variable actually is a string    example   name         insert this line to tell visual studio that your variable is a string  name   input  whats your name   n    name   name upper    then when you type name u     it will give you intellisense

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In my case  I was simply unobservant at first and didn t see that one of the 30  projects in my solution said   load failed   even though one of its files was still loaded in the editor  but had no intellisense  Reloading the project did the trick

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For python  try clicking on the  Python X X  button on the left side of the bottom status bar and changing it to different values   This is the only thing that worked for me

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I had the issue in just one file  After creating the new class and working on it  it hadn t been added to the scope of my project  So when I closed and reopened my solution the following day  the file wasn t in the project scope   Adding the existing item to the project scope fixed it for me

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I am facing the same issue with Visual Studio 2015 Preview  I have closed that respective file and re-opened it  That fixes it for me

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In my case  I had added an  ascx cs into the project via right-click     Include in Project   but the project had it set as  Content  instead of  Compile    Once I set this to  Compile   intellisense began working again

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Visual Studio 2019 The only thing that worked for me  Go to Tools - gt  Options - gt  Text editor - gt  C  - gt  Intellisense And turn off  Turns out I was too eager to try everything that s new in VS    It was broken in only one solutions though

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I should note that I haven t had the issue since upgrading my RAM  I can t confirm if it s related but the problem was prevalent when I had 2-4GB RAM  No problems since going to 8 and 16GB   If only one file window appears to be affected  close and reopen that file  If that doesn t work  try below   In Visual Studio    Click Tools- Options- Text Editor- All Languages- General  Uncheck  Auto list members   Uncheck  Parameter information   Check  Auto list members   yes  the one you just unchecked   Check  Parameter information   again  the one you just unchecked  Click OK   If this doesn t work  here s a few more steps to try    Close all VS documents and reopen If still not working  close reopen solution If still not working  restart VS     For C   projects  MSDN has a few things to try  MSDN suggestions  The corrupt  ncb file seems most likely   From MSDN    Close the solution  Delete the  ncb file  Reopen the solution   This creates a new  ncb file     Notes    Tested in VS 2013 2015   Logging possible causes    Copy pasting controls in a source page  I found that my designer vb file didn t update from this  either  Copy pasting code from another page that caused an error because the code copied referred to a control that wasn t on the page I was pasting to  C   project has corrupt  ncb file    Please add to comments if you notice behavior that causes this

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MS Visual Studio 2017 Pro  C   projects Too many good answers for this question  This worked for me   IntelliSense works only when i load the project by double clicking the solution file  I tried all the above answers with unfortunately no luck  Dll s  setting  dependencies   you name it  It sucks that you have to go through all that for an autocomplete    miss my Vim config

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I ve dealt with this for as long as Visual Studio existed  And yes  even in the current version it still fails  especially for large projects    I want to share small free tool that my friend and I wrote to address this exact same issue  You basically close your solution  drag its folder into the icon for this tool and it will reset all intermediary files for you   Read the text manual inside if you want to know which ones  It s not just one file    I use it to clean up all my VS projects  So here you go

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The build   intellisense in the Error List quit working on my web project only  The fix that finally worked for me was removing the  csproj user file  When I opened the solution Visual Studio recreated the file and it was all working as expected  Then I deleted the new file and put my old one back and it was still fixed  so

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One of the thing that just helped me is    Deleting every project file that is out there  My project has 10 folder  30  files  Recreating the project    This takes about 5 mins - but saves a lot of time as intellisense actually started working   One thing to note was that the memory usage  right top corner of VS 2013 ultimate  shows about 40  drop

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Try to install the update 1 package  link  I have had the same problem and solved when I installed the update

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I have VS2012 update 4 and the problem is intermittent  but once it strikes on that particular page being edited it is there to stay  One solution is simply to close the page and re-edit it    Here s some KBD shortcuts to try to reboot it  but don t know if they work     Visual Studio keyboard shortcut to display intellisense  None of those solutions worked for me  BTW I m using C      I think this is another IS bug     it s had lots of issues in the past

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If anyone is still having this issue  simply close the solution and then reopen it

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Intellisense did not recognized an imported namespace in my case  although I could compile the project successfully  The solution was to uncheck imported namespace on project references tab  save the project  check it again and save the project again

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I had the same problem on Visual Studio 2010 on C   and I surpassed it by Tools -  Options -  Text Editor -  C C   -  Advanced -  Disable database -  False  Ok   Close VS  open VS and voila

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I am having the same issue  Intellisense randomly will stop showing in some files  but not others  I just had it happen to me again  Hitting Ctrl   Space won t show anything in Form1  switching to Form2 or any other class will pop up the list as expected  Restarting Visual Studio usually does the trick  though it s highly annoying and ridiculous for such a basic feature to be broken

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I spent a lot of time researching the same problem  Some solutions related this bug with some referenced assemblies  Others said that Microsoft Windows Design Extension dll and  Interactivity dll should be in the references of the project  But none of these solutions worked for me   I think it is a bug in Visual Studio 2012  Microsoft has to fix it

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What worked for me is by disabling and then re-enabling the Resharper   Goto Tools - gt  Options- gt  Resharper - gt General  Click Suspend -  This disables the resharper  Then check your Intellisense is working or not   In my case  it did and then I resumed the Resharper    If this does not work  you might need to  Goto Resharper - gt  Options- gt  Environment - gt  Intellisense - gt  General  And Change Intellisense to Visual Studio

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I had this problem when some of the dependent assemblies are changed but locked by an other instance of visual studio  2015

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I had the same issue  it turned out to be that nuget packages were not automatically downloaded for a solution i downloaded from the repository freshly  thus intellisense was not available since none of the required packages to show the right suggestions were available

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My solutions  I was using perforce  is to load the entire solution instead of the individual file   Originally    I had loaded a file by click on it in perforce  Solution    Close VS  which closed the individual file     Reopened by starting the solution file instead of the individual file

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What works for me is removing the dynamically-built  suo file  Solution User Options   in the  vs  hidden  directory located at he same path as the solution file   I have this problem sometimes coming back  and it s on different project s solutions  but never VS wide  New Projects always work fine    Running VS2015 Professional Update -2-

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If you are using Master Pages then create a blank master page use that master page in your content page  If this resolve the problem then it means your original master page have some problem  Port your original code step by step to new master page and test after each port if intellisense is working properly  This trick solved my intellisense problem

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It didn t work for me with all those steps  Strangely enough I noticed Intellisense was working for another solution in visual studio 2015  but not for a specific one   I located and deleted the  suo file and restarted visual studio  That fixed it for me

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With visual studio   2015 I deleted the  suo file   search for it in your project through file explorer   Restart visual studio and you re good to go

[visual-studio] Why does intellisense and code suggestion stop working when Visual Studio is open?

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