When I run my Web API application I get the following window:
It just stays like that indefinantly, until I hit cancel.
When I do hit cancel, this error message is shown:
I have tried rebooting, and running iisreset /restart but it does not fix it.
Any ideas what I can do to get my debugger working again?
NOTE: My Web API 2 project's Servers setting is set to Local IIS. My service is hosted by IIS and when I am not debugging, it works fine.
A possible fix:
Check the "Enable Just My Code" in Tools->Options->Debug
I just did a reset for all the settings for VS and it worked again.
Tools => Import and Export Settings => Reset All Settings
good luck!
I had this issue for Visual Studio 2017 and like with the previous post I had Debugging option "Enable .NET Framework source stepping" ticked. Un-ticking fixed the issue.
So as I commented before I had this same issue, but I now figured out the cause and have a solution.
I just got a new machine last week (this issue was actually one of the reasons why) and after a while I had the same issues, not being able to debug my projects. Luckily because I was installing all the updates one by one I was able to pin-point when it started happening.
It seems the latest update for the "Microsoft ASP.NET and Web Tools" extension breaks something.
Sadly, uninstalling or reverting the Web Tools extension is not easy: Remove this extension by going to the Windows control panel and modifying your Visual Studio installation. I had to remove Visual Studio completely and reinstall it (repair didn't do the trick).
You can update and install all your extensions as you wish, just make sure that you don't update the Web Tools extension
I tested this on my old machine and it did the trick there as well.
I've also created an Issue on GitHub as I won't be updating the extension until this is fixed, if anybody has additional information please add it to the Issue.
In Visual Studio 2015, go to Tools -> Options -> Debugging and deselect "Enable .NET Framework source stepping". This may relate to an issue with loading symbols, so if you want to keep the ability to debug .NET Framework source, then it may help to search the web for how to clear the symbol cache, or preload it, or set your symbol server, and so on.
In Visual Studio 2017, I just restarted my machine and ran the solution, no other windows opened not even a browser, although visual studio took a long time to open (30+ projects in a solution) the problem did not reoccur.
I had the same issue in VS 2017 and un-checking 'Native code' did the trick. Not sure why it was checked.
In my case I set Debugging ->Symbols -> To "Load Only Specified Modules" to include the symbols for, in my case a devops symbols feed for some internal NuGet packages
Options>Debugging>Symbols>Load Only Specified Modules
By checking the option "Always load symbols where located next to modules" the setting won't mess with the regular/classic debugging in VS for your own code
This way the Symbols are still loading where needed and Visual Studio is not trying to load debugging information for all the IIS .net dlls that were loaded by w3wp
Alternatively it can also be configured to not load symbols for microsoft.*.dll and it will also work.
Didn't see this in the current answers, so thought I'd give my 2 cents in 2022:
What worked for me:
Make sure to check that your IIS application pool hasn't been stopped (and restart it if it is), and then if that's not the case, restart your IIS server.
If you don't where those settings are, open our Internet Information Services (IIS) Manager, Application Pools are in the left-hand column, and restart/start/stop your server is in the right column.
Like the subject says, I've suddenly lost the ability to view class members (properties and methods, or any structure at all) from the Solution Explorer. I've looked in settings unsuccessfully (not that I changed anything), and have tried cleaning the solution, rebuilding, restarting Visual Studio, etc. to no avail. What could be causing this? Thank you.
This setting is controlled by the UseSolutionNavigatorGraphProvider registry value from HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\12.0.
If you have the VSCommands extension installed, you can control it from Tools - Options - VSCommands 12 - IDE Enhancements - Solution Explorer - Disable Graph provider.
Try using the extension below it might help:
Disable Solution Explorer's Dynamic Nodes
Checkout the below link and enable the settings (set the value to 1) and see if that works.
https://visualstudioextensions.vlasovstudio.com/2013/11/04/hide-class-info-in-visual-studio-20122013-solution-explorer/
Is it website project or web application project? We couldn't see any class member hierarchy in website project.
You can find it in view dropdown menu! and if not then clear your question more please
I'm running Visual Studio 2013 Pro (RTM version) on my formatted PC (Windows 8.1 fresh install).
I don't know why, but Visual Studio 2013 Pro is very very slow! Slow for building, debugging, navigating in the IDE... my hard disk drive LED is not lighting up at all!
I'm on a little MFC (C++) project using the Boost library.
Any ideas?
It is something concerned with the graphics drivers. If you update them you will be fine.
Or you can disable the hardware graphics acceleration in Visual Studio according to these steps:
In Visual Studio, click "Tools", and then click "Options".
In the Options dialog box, navigate to the "Environment > General" section and clear the "Automatically adjust visual experience based on client performance" check box. (Refer to the following screen shot for this step.)
Clear the "Use hardware graphics acceleration if available" check box to prevent the use of hardware graphics acceleration.
Select or clear the "Enable rich client visual experience" check box to make sure that rich visuals are always on or off, respectively. When this check box is selected, rich visuals are used independent of the computer environment. For example, rich visuals are used when you run Visual Studio locally on a rich client and over remote desktop.
References:
You experience performance issues, product crashes, or rendering issues in Visual Studio 2013
Try to set Current source control plug-in to None (menu Tools → Options → Source Control), if you are using the Microsoft Git provider, which seems to slow Visual Studio 2013 down more and more the larger the repository gets.
I had the whole Dojo Toolkit framework under source control using the Microsoft Git provider, and it got to the point where there were delays from the time I hit a key to the time the glyph would appear on the screen. That bad.
When/if you need Git again, you can switch to the TortoiseGit provider or Git-Extensions, both will work without slowdown. I like Git-Extensions, personally.
I too have struggled a bit with bad performance in Visual Studio 2013 (Premium). Pretty much the same issues as TS had. Slow navigation, scrolling, building... just about everything. Luckily I have manage to solve my own problem by disabling Synchronized Settings in Visual Studio.
Go to menu Tools → Options → Environment-Synchronized Settings and remove this option by unchecking the checkbox.
In the case of web applications, another cause of slow building and debugging (but not IDE navigation) could be the Browser Link feature.
I found that with this switched on, building would take 4 times longer and debugging was painful - after every postback, web pages would freeze for a few seconds before you could interact with them.
I was using a solution upgraded from Visual Studio 2012. Visual Studio 2013 also upgraded the .suo file. Deleting the solution's .suo file (it's next to the .sln file), closing and re-opening Visual Studio fixed the problem for me. My .suo file went from 91KB to 27KB.
I had the same problem and the only solution that worked for me was to follow the three steps presented below:
Clean the WebSiteCache folder (you may find it at
C:\Users\%USERNAME%\AppData\Local\Microsoft\WebSiteCache)
Clean the "Temporary ASP.NET Files" folder (find it at
C:\Users\%USERNAME%\AppData\Local\Temp\Temporary ASP.NET Files)
Restart Visual Studio
What fixed it for me was disabling Git by setting Current source control plug-in to None in Visual Studio, menu Options → Source Control:
This issue seems to be because of uninstalling the SQL Server Compact edition (4.0).
I was having this issue, and it got fixed after installing the SQL Server Compact edition 4.0.
On closing Visual Studio 2013, I was getting a message to install SQL Server Compact edition as a C++ project needed some thing... can't put finger on anything.
Resolve this issue by installing Microsoft SQL Server Compact 4.0
Microsoft SQL Server Compact 4.0
I can advise an option like this.
CodeLens can be disabled like as at the picture. It gives a lot of performance goodness.
If you are debugging an ASP.NET website using Internet Explorer 10 (and later), make sure to turn off your Internet Explorer 'LastPass' password manager plugin. LastPass will bring your debugging sessions to a crawl and significantly reduce your capacity for patience!
I submitted a support ticket to Lastpass about this and they acknowledged the issue without any intention to fix it, merely saying: "LastPass is not compatible with Visual Studio 2013".
I had the same problem and all the solutions mentioned here didn't work out for me.
After uninstalling the "Productivity Power Tools 2013" extension, the performance was back to normal.
One more thing to check; for me it was Fusion logging.
I'd turned this on a very long time ago and more or less forgotten about it. Getting rid of the 5000+ directories and 1 GB of logged files worked wonders.
There is a good workaround for this solution if you are experiencing slowness in rendering the .cs files and .cshtml files.
Just close all the files opened so that the cache gets cleared and open the required files again.
Visual Studio Community Edition was slow switching between files or opening new files. Everything else (for example, menu items) was otherwise normal.
I tried all the suggestions in the previous answers first and none worked. I then noticed it was occurring only on an ASP.NET MVC 4 Web Application, so I added a new ASP.NET MVC 4 Web Application, and this was fast.
After much trial and error, I discovered the difference was packages.config - If I put the Microsoft references at the top of the file this made everything snappy again.
Move the Microsoft* entries to the top.
It appears you don’t need to move them all - moving say <package id="Microsoft.Web.Infrastructure" has an noticeable effect on my machine.
As an aside
Removing all contents of the file makes it another notch faster too*
Excluding packages.config from Visual Studio does not fix the issue
A friend using Visual Studio 2013 Premium noticed no difference in either of these cases (both were fast)
UPDATE
It appears missing or incomplete NuGet packages locally are the cause. I opened the Package manager and got a warning 'Some NuGet packages are missing from this solution' and choose to Restore them and this sped things up. However I don’t like this as in my repository I only add the actual items required for compilation as I don’t want to bloat my repository, so in the end I just removed the packages.config.
This solution may not suit your needs as I prefer to use NuGet to fetch the packages, not handle updates to packages, so this will break this if you use it for that purpose.
For me, the problem was the Start page -- it was downloading content and causing Visual Studio to hang.
The only solution for me was to:
Kill the DevEnv process from Task Manager
Start Visual Studio in Safe Mode from the command line:devenv.exe /safemode
Go to menu Tools → Options, and select the Environment/Startup options
Choose "Show empty environment" for the startup action
Close Visual Studio
Restart normally
Running unit tests was slow. It was a ReSharper issue.
Menu ReSharper → Options → Environment → General ... Clear Caches
Menu Tools → Options → ReSharper → General ... Suspend Now
Close Visual Studio
Delete the .suo file.
Open Visual Studio again.
Re-enable ReSharper.
I also had an issue with a slow IDE.
In my case I installed
ReSharper
Npgsql (low chance to cause the problem)
Entity Framework Power Tools Beta 4
The following helped me a bit:
Disabled synchronization - menu Tools → Options → Environment-Synchronized Settings
Disabled plug-in selection - menu Tools → Studio → Options → Source Control.
Disabled Entity Framework Power Tools Beta 4 - menu Tools → Extensions and Updates
Uninstalled JetBrain's Resharper - WOW!! I am fast again!!
Change the Fusion Log Value to 0. It solved my issue.
This is the FusionLog key in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion
Check ForceLog value (1 enabled, 0 disabled).
I was also facing this issue for quite long time. Below are the steps that I perform, and it works for me always:
Deleting the solution's .suo file.
Deleting the Temporary ASP.NET Files (You can find it at find it at %WINDOW%\Microsoft.NET\Framework\Temporary ASP.NET Files)
Deleting all breakpoints in the application.
Visual Studio 2013 has a package server running, and it was spending up to 2 million K of memory.
I put it to low priority and affinity with only one CPU, and Visual Studio ran much more smoothly.
Performance Explorer
Have you been using menu Analyze → Performance and Diagnostics? I have! It's awesome! But you may want to clean up.
Open the Performance Explorer. If you collapse all of the items in there, select all, then you can right click and do Delete.
My solution opens faster and is in general running much faster now.
Also you may notice changes to your sln file as shown. For me, this section was deleted from the sln.
GlobalSection(Performance) = preSolution
HasPerformanceSessions = true
EndGlobalSection
In Visual Studio 2015 Community edition, I've experienced a very (very) slow IDE after changing the "Environment Font" on menu Tools → Options... → Fonts and Colors.
Reverting this options back to the default value ("automatic") solved it immediately.
I had similar problems when moving from Visual Studio 2012 → Visual Studio 2013. The IDE would lock up after almost every click or save, and building would take several times longer. None of the solutions listed here helped.
What finally did help was moving my projects to a local drive. Visual Studio 2012 had no problems storing my projects on a network share, but Visual Studio 2013 for some reason couldn't handle it.
I had a Visual Studio 2013 installed, and it was running smoothly. At some point it started to get sluggish and decided to install Visual Studio 2015. After install, nothing changed and both versions were building the solution very slow (around 10 minutes for 18 projects in solution).
Then I have started thinking of recently installed extensions - the most recent installed was PHP tools for Visual Studio (had it on Visual Studio 2013 only). I am not sure how can an extension affect other versions of Visual Studio, but uninstalling it helped me to solve the problem.
I hope this will help others to realize that it is not always Visual Studio's fault.
I added "devenv.exe" as an exclusion to Windows Defender. This solved my problem completely. People can try this as their first try.
I have the same problem, but it just gets slow when trying to stop debugging in Visual Studio 2013, and I try this:
Close Visual Studio, then
Find the work project folder
Delete .suo file
Delete /obj folder
Open Visual Studio
Rebuild
None of the suggestions worked for me, but I did solve my problem. I had tried most of the other recommendations before coming to the following solution.
My Scenario/Problem:
Using Visual Studio 2017 with ReSharper Ultimate. Keyboard input in the IDE got super slow as others have described. The last change I made to my solution was to add a new web site project, so I looked into that. After trying a lot of things, I tried adding a second web site project, so I could try to replace the first one, and Visual Studio just tanked after that. It wouldn't even load the solution anymore.
My Solution:
I forced Visual Studio closed and then I removed the newly added web site project(s) from the .sln file using Notepad. After saving and starting Visual Studio, my solution loaded quickly and everything seemed to be back to normal. I added a new Web Site with a slightly different configuration (see the thinking below), and the problem did not present itself again.
My Thinking:
I think the problem stemmed from creating the new web site project and using a file system path to a network share that is hosted in Azure. I'm working over VPN which tends to slow things down, and I occasionally experience various routing problems with some services, so my problem/solution might be a bit of a snowflake. I changed the file system path to be a local repository and will publish the files as needed which seems like a much better way to go.
I had a Visual Studio behavior where the typing was slow for my HTML files. Previously when I installed, I guessed that because my HTML files were generic HTML that the need to install any web development tools from the workload component of the installer was unnecessary. I went back and installed this bit and Visual Studio behavior became as I expected it.
This already has a bunch of answers here, but a general way to easily boost Visual Studio is to clear your temp files.
Press the Windows Key and R, and enter 'temp'. Press enter, and provide any administrator permission if you need to. Then press Control A to select all, and hit the Del key. Remember to provide any administrator permissions, and if 'the item is already in use' then just press skip.
After this, Press Windows Key and R again, but this time type '%temp%'. Repeat the previous steps in the new directory.
Finally, empty the recycle bin.
This might not help a ton, but it should boost general performance.
I'm using Visual Studio 2010 Ultimate edition, but now it won't show the project properties page. Instead an error message show up saying
An error occurred trying to load the page.
COM object that has been separated from its underlying RCW cannot be used.
This error has plagued me for a long time. I tried almost everything (uninstall/reinstall/repair/uninstall addins, etc) except reinstall
OS.
Help me out. Thx a lot!
Finally I found out what had gone wrong. It's misbehaving addin - TestDriven.NET.
But things could be different for you. But anyway, it's addins.
The process to find this is that you Goto "Tools -> Options" dialog. Goto "Environment -> Add-ins/Macros Security" node. Uncheck "Allow add-in components to load". And then restart VS 2010 to see if the issue goes away. If it does, then it must be an addin in those folders specified. And next step is to enable addins to load, and remove the directories in the list one by one to identity which addin caused the issue. And at last, disable or simply remove/uninstall it.
Restarted VS 2010 SP1 solved my problem!!!
in my case it was the latest update of VSCommands for VS2010...
A complete UnInstall/Re-Install of the VSCommands did the job :)
This also happened to me for some unknown reason and it turned out I had to disable source-control plugin (the default one that had been happily working for a long time):
Tools -> Options -> Source control : set plug-in to "None" and restart VS.
I was facing the same issue in Microsoft Visual Studio Professional 2015 Service pack 1. I found that it was happening due to GhostDoc Community.
I upgraded GhostDoc Community 4.9.x to 5.1.x and issue get resolved in Visual Studio 2015 Service pack 1.
I am developing my minor and major project in VS2008. Suddenly tools have started to go missing from my toolbar. I have visited several forums but am not able to solve the problem.
Basically I have silverlight 2.0 installed with SDK, and tools and all.
Now when I need to access the media element control from silverlight it does not display.
Further more on listing all controls I can see those controls but they are disabled.
Please Help Me out.
Regards
Shrey Mishra
try it:
Reset all setting in tools -> Import and Export Setting menu
Or
2 You should update your VS 2008 SP1 with . NET 3.5
Hope this help,
I am not too sure, but it has something to do with the references in the project. I have the same problem with some of my projects when i started adding references to many assemblies.
When you reset the toolbox ,does it work ? On my computer, whenever I reset the toolbox, the icons come back only to disappear some time later after rebuilding the application many times.
Icons should not disappear from anywhere other than your toolbox.
Had the same problem:
Reset all setting in Tools -> Import and Export Setting menu
helped nicely))
It's weird but I was able to solve the problem by simply removing USB Mouse .:)
When i checked this out with some others developing on their laptops it came to me that it happens with very few of us in VS 2008 but still can drive on mad.