Error detecting visual studio installation system argumentnullexception value cannot be null



Can’t find a fix for System.ArgumentNullException: Value cannot be null

I’m really new to coding, so I don’t know how to fix this error:

$mcs *.cs -out:main.exe $mono main.exe Insert the first number:
Unhandled Exception: System.ArgumentNullException: Value cannot be null. Parameter name: String at System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) [0x00003] in :0 at System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) [0x00015] in :0 at System.Int32.Parse (System.String s) [0x00007] in :0 at RectangleVolume.Program.Main () [0x0000f] in :0 [ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentNullException: Value cannot be null. Parameter name: String at System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) [0x00003] in :0 at System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) [0x00015] in :0 at System.Int32.Parse (System.String s) [0x00007] in :0 at RectangleVolume.Program.Main () [0x0000f] in :0

Here is the code:

If anyone knows how to fix the error I would appreciate your help, ty

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Error detecting visual studio installation system argumentnullexception value cannot be null

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Answered by:

Question

We have a project “A” which is a C# DLL project. This DLL is consumed in a windows forms C# project.
Currently we are facing problem of “Null Exception” in the below scenario.
An windows application (project X ) is written including Project “A” 1.1 version DLL. This works fine with Project “A” 1.1 version DLL.

Project “A” version 1.0 DLL is installed on a Machine X, and the above project X executable and Project”A” 1.1 version DLL is copied into the Installation directory of Project”A” version 1.0 on machine X..
While running the project it is expected to return “version mismatch or File not found error” but below error message is thrown.

System.ArgumentNullException: Value cannot be null.
Parameter name: format
at System.String.Format(IFormatProvider provider, String format, Object[] args)
at ProjectA.ctor(IntPtr windowHandle)
at TestDT.frmScan.frmScan_Load(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

I know that the user is not suppose to do this, but still let me know why Null Exception is thrown instead of Version mismatch or file not found exception.

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Could not register the assembly System.ArgumentNullException: Value cannot be null — Problem with Visual Studio for Mac

I have a problem building a project by error: Could not register the assembly ‘Xamarin.Essentials’: System.ArgumentNullException: Value cannot be null.

I did all the recommended cleaning on VS and it still doesn’t work. Anyone had a similar problem?

Visual Studio for Mac — version 8.6.5 (build 23)

Xamarin.Essentials — version 1.5.3.2

Error Visual Studio description: /Users/. /App.iOS/MTOUCH: Error MT4116: Could not register the assembly ‘Xamarin.Essentials’: System.ArgumentNullException: Value cannot be null. (MT4116) (App.iOS)

2 Answers 2

Could not register the assembly ‘Xamarin.Essentials’: System.ArgumentNullException: Value cannot be null

1) close VS for Mac, delete all nuget caches under

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2) delete the whole bin and obj folder under the project folder and then restart your project again.

3) try to uninstall that Xamarin.Essentials nuget package and reinstall that package in your project to test again.

Also, try the lower version 1.3.1 .

4) you can also create a new project and then install that package to test whether the issue still persists in the new project.

Источник

Visual Studio 2022 Package Manager Console Entity Framework commands return ArgumentNullException #1916

Comments

vsfeedback commented Nov 16, 2021

[severity:I’m unable to use this version] [regression] [worked-in:16.10]
Hello,

I am trying the VS 2022 preview and am encountering an issue when I use the package manager console. I use Entity Framework 6 in my project and commands like Update-Database or Add-Migration all fail with the following error:
System.ArgumentNullException: Value cannot be null. Parameter name: type at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.Activator.CreateInstance(Type type, Object[] args) at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetProjectTypes(Project project, Int32 shellVersion) at System.Data.Entity.Migrations.Extensions.ProjectExtensions.IsWebSiteProject(Project project) at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetTargetDir(Project project) at System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName, Boolean useContextWorkingDirectory) at System.Data.Entity.Migrations.AddMigrationCommand.Execute(String name, Boolean force, Boolean ignoreChanges) at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command) Value cannot be null. Parameter name: type

When I do those same commands in VS 2019 with the same code, it works without any problem.

Original Comments

Feedback Bot on 8/2/2021, 09:41 AM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

Arthur Vickers [MSFT] on 8/4/2021, 08:18 PM:

I am not able to reproduce this on the latest builds of VS 2022. Can you please make sure you are using the latest version of EF6–that is, version 6.4.4. If it still does not work, then please upload a minimal csproj file that reproduces the issue so that we can further investigate.

Why do we ask for more info?
We try to reproduce all issues reported with the information provided in the description and comments. When we can’t reproduce the issue, we ask you for more information so we can resolve the issue as quickly and efficiently as possible.
In our guidelines, you can get tips on how to provide clear and simple reproducible steps.

Feedback Bot on 8/11/2021, 09:27 AM:

We will close this report in 14 days because we don’t have enough information to investigate further. To keep the problem open, please provide the requested details.

Original Solutions

Feedback Bot solved on 8/26/2021, 09:56 AM, 0 votes:

We are unable to investigate this issue further without the additional information requested. If you are able to provide more information, you can request the issue being reactivate below. See our guidelines for further information about our process.

Tore Aurstad on 11/7/2021, 11:41 AM:

I am able to add migrations with Add-Migration, but using Update-Database freezes Visual Studio 2022 latest preview. If I use earlier Visual Studio version such as 2017 pro or 2019 pro, it works.
Some additional info:
Functionality area: Package Manager Console
DAL : Entity Framework 6.4.4
Problem: EF Code First migrations can be added, but running Update-Database makes VS2022 unresponsive
Standard EF: yes, standard Code First
Affected: Recreated on multiple developer PCs at work
Workarounds: need to switch to VS2017

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Please look into EF6 and Package Manager Console in VS2022.

Michael Pose on 11/10/2021, 06:10 PM:

I am experiencing the same issue:

Versions:
Microsoft Visual Studio Professional 2022 (64-bit) — Current
Version 17.0.0
NuGet Package Manager — 6.0.0

using Entity Framework 6.2.0

The text was updated successfully, but these errors were encountered:

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Error detecting visual studio installation system argumentnullexception value cannot be null

Answered by:

Question

I now get this message anytime I try to run (debug/release) a unit test. I’ve given up trying to get my complicated solutions to work again (they worked fine for weeks but now crash). I can easily reproduce this problem with a new solution.
After a clean reboot, I create a new C# Solution/project. I add the following public method to the class:

public string tryUnitTest()
<
return «This is a test of the Unit Test.» ;
>

  • Next, I right click and choose «Creat Unit Tests. «
  • pick: «create a new Visual C# Test project. » OK
  • It builds a unit Test project containing the default test for our simple method.
  • Select the unit test project as startup
  • Hit F5 (run)
  • After a clean compile it appears to sit there doing nothing.
  • clicking on anything (window of the solution or desktop) causes the «ArgumentNullException Value cannot be null. Parameter name: menuService» message to appear.
  • When you click OK on that I get the » Microsoft Visual Studio has encountered a problem and needs to close.” message, which closes Visual Studio 2005 Team Edition for Software Developers.

As I said, I have been using unit tests for a few weeks without incident. I am not sure what changed in my environment, but any solution with unit tests (even one from other developers) now crashes when it is run from my machine.

Any assistance would be appreciated.

Answers

devenv /setup /resetuserdata may fix the issue.

I’ve seen similar error a couple of times. This was after playing with VS Registry and it happens right when we display TestResults window. Reinstalling VS fixed the problem. Can you please get the repro, attach unmanaged debugger (use another VS instance) and do Debug->Save memory dump. use full dump. Then send this file to us.

Thank you,
Michael Koltachev
VSTS

All replies

F5 probably is running under the debugger. If so, what about Ctrl-F5? Same problem? (ie: is this problem only when debugging a test, or even a pure execution).

I’m at a bit of a loss — Haven’t seen anything like this before — so I’m trying to narrow it down.

This error happens if I run under Debug or Release. I have not actually used the Ctrl-F5 key, I just switch between the two with the combo box in the tool bar.

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Apparently several other people in this office have had simular problems. They thought it had to do with opening solutions in different versions of Visual Studio (Team Builder/Archetect/professional). It turns out that they don’t use the built in unit tests anymore, they have all given up on it. They hadn’t seen this happen on a new Solution like I am getting, but they probably haven’t tried either. I had the problem first with a complex solution but tried to simplify the problem to eliminate potential causes. Everything has been running fine since I havn’t tried setting a unit test project as startup.

I can send you my solution if you want, maybe some of the files are getting corrupt defaults from something on my machine?

devenv /setup /resetuserdata may fix the issue.

I’ve seen similar error a couple of times. This was after playing with VS Registry and it happens right when we display TestResults window. Reinstalling VS fixed the problem. Can you please get the repro, attach unmanaged debugger (use another VS instance) and do Debug->Save memory dump. use full dump. Then send this file to us.

Thank you,
Michael Koltachev
VSTS

Looking to see if the resetuserdata helped at all. We aren’t able to repro internally — but the problem seems pretty significant on your side, so we’d like to figure out what’s different that’s causing the problem.

Well, I havn’t looked at this in a while (completely did without Unit Tests). So, now I go back in and try to «catch it in the act» again and it didn’t fail. I did get a new pop-up message: » Source Control Plug-in
The project or solution you opened requires a source control plug-in that is unavailable at this time.
To enable source control, please confirm that the plug-in has been installed correctly and then restart Microsoft Visual Studio .»
I guess it is possible that I was getting this with my test project before, so I tried my real solution and it worked fine running tests without any problem (or this message). The test solution was not in VSS and my actual one was, thus the message?

So, The good news is that it works now. The bad news is I have no idea why. I did not run the ResetUserData command — I was kind of afraid of it messing more stuff up that was working — and I did not re-install VSTS. I’ve been working on some other solutions lately but the original solutions that all had this problem seem to be working fine.

If this happens again I will try to debug it and grab a stack dump, though I could not find the stack dump option the one time I did try to debug this crash — it crashed without interacting with the other VS that was debugging it with as far as I could tell.

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