I have installed .NET core 3.1 and verified i can run .NET core 3.1 apps on my machine however when i go to create a new project the dropdown for target frameworks only allows .NET 6.0. I am using visual studio 2022. I am using visual studio 2019 on my laptop and i can add .NET core projects just fine.
Has anyone ran into this?
Open Visual studio installer from start menu
Select Modify from Visual Studio that you want to add
in individual components select .net core or framework that you want to add to your visual studio version
Create the app in either 5 or 6. Then in the Application properties change the Target Framework to .Net 3.1.
Long term support is limited for anything before .Net 5, so they are not making it an option on new projects and directing to the newer versions.
I'm using VS2022 and was facing the same issue. I installed the .NET SDK 3.1.416 from here and restarted the VS. I am now able to create project with .NET core 3.1 target framework.
I want to debug an empty WebApi Project based on .NET Core 2.2.
I installed the "Core 2.2 SDK x86" and changed the target framework to 2.2:
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.2</TargetFramework>
</PropertyGroup>
When I started to debug this project, IIS starts, but in the route api/values I see nothing (it loads forever) and I get this error:
The target process exited without raising a CoreCLR started event.Ensure that the target process is configured to use .NET Core. This may be expected if the target process did not run on .NET Core
In my solution WPF and Class Library projects exist. I wanted to make a WebApi for it. Like I said, it's an empty base project generated by Visual Studio 2019. I just installed Core 2.2. Why do I get that error and what am I doing wrong?
I had the same issue.
I ran Program.cs file from the command line and the error message was different.
So, apparently, I didn't have the appropriate .NET Core runtime installed.
You can download it by the following link - https://dotnet.microsoft.com/download
I was facing the same issue!
I updated my Visual Studios to the most recent via the VS Installer.
While updating, I also added the following VS Workloads:
ASP.NET and web development
.NET desktop development
See about workloads here:
https://github.com/MicrosoftDocs/visualstudio-docs/blob/master/docs/install/modify-visual-studio.md
This worked for me! 😊
I did not have to downgrade or remove anything
I had to do a "clean" and "rebuild" of the project and after that it worked again.
I ran with the same problem. But for me it was that my project was running in .NET Core 2.2, which I didn't have installed. I'm using VS 2019.
So for the solution, just go to Visual Studio Installer and for your VS 2019 hit "Modify" like in the following image (it's in spanish though):
Then, click "Individual Components", like
And then, make sure you checked in ".NET Core 2.2 Runtime (EOL)" (and above like .NET Core 3.0, if you want) and click "Modify", as shown
Hope this works for you.
In my case, switching to x64 save the day.
It seems like there are lots of different causes for this. For me, it was because I had upgraded a .csproj file but I hadn't updated the image used in my docker file.
I had same issue after package upgrading. You don't need any vs update.
Just go to
dotnet.microsoft.com/download/dotnet-core/2.2
and get runtime
dotnet-hosting-2.2.7-win.
I had the same error. Remove "Microsoft.AspNetCore.All" from dependencies.
I have downgraded "Microsoft.AspNetCore.App" version and error gone .
Deleting all bin folders of my solution
building everything again did the trick for me
(.NET Core 3.1 VS 2019)
I see many answers like try and error
after searching about the issue, I got the following :
it simply depends on three parameters and they have to be compatible
Windows platform "x86,x64" you can change it from the CPU option of the visual studio
or choose any CPU hence the install .net x framework should be compatible with the windows
The target framework for the project
(check the project target framework "right-click on the project and check target framework") if it is 5 so the enabled in the third parameter should be 5 or change this one but take care you should tell the other team members if you change it
The Enabled framework go for tools and get tools and go for individuals component and chose the target framework the same as found in step 2 and press modify
Faced this issue during xUnit testing. Downgrading nuget package "Microsoft.NET.Test.Sdk" to 15.9.0 worked for me
I got this error because of a Project reference pointing to a project, that did not exist anymore (was removed in merged git-commit). Solved it by right-clicking the project, then Edit Project File, delete the reference and save.
I was trying to run a project that used net core 2.2 but I didn't have it, and there was no error(I had 1.1), so after installing the 2.2 using the "Visual Studio Installer" it worked like a charm. =)
I restarted my Visual Studio instance in Admin mode and I was able to debug.
After closing Visual Studio I can now start in normal mode and debug as expected. I'm not sure what changed though.
I was missing a reference to AWSSDK.Core. After installing the specific version and re-starting VS2019 and rebuilding, the project ran fine.
All of a sudden it stopped working. For me clean solution and re-build solution worked.
I was getting a similar error with my project: The target process exited without raising a CoreCLR started event.
My startup project was targeting multiple frameworks: netstandard2.0;netcoreapp2.2
I fixed this issue by changing my target framework from netstandard2.0 to netcoreapp2.2 using the following stackoverflow directions: How to switch between target frameworks for .NET Core projects in Visual Studio
Be sure to install the exact version of .net core that you want your project to run on
I had this issue and finally tracked it down to doing a "publish" operation with a deployment mode of: "Self contained" That resulted in dropping all .NET runtime binaries in my bin directory. Where I think things got totally messed up is I have several solutions all using that same common bin directory, each build different exe's and dll's.
Only one was for a self contained deployment as a test. I think that started mixing up some of the minor dlls for the .NET core and causing this issue. Once I purged all the dll's that were "not mine" and rebuilt things started working again. I'm using Visual Studio 2019 16.8.2 / .NET Core 3.1
I realize the original question is regarding .NET Core 2.2 but this question comes up first when searching for the main issue.
.Net Core 2.2 is required to be installed. I fixed when I added this in Visual Studio Installer.
VS2019 16.7.1 ASP.Net Core 3.1
Our Nunit test projects that issued this error, only worked with a very select set of Nunit and Microsoft packages.
Microsoft.NET.Test.sdk - 16.5
Nunit - 3.12
Nunit3TestAdapter 3.16.1
But here's the catch, you have to go into
c:\users\yourname\.nuget\packages and look for all three folders shown above. If you find any other version in those folders, delete it.
I found two versions in the Microsoft.NET.Test.SDK folder. I suspect the newer version was being loaded. Why? Because when I deleted it everything ran fine.
A corrupt layout is also possible, had this happen myself. To fix, go to projpath\bin\x64\configtype\AppX, for example:
C:\Users\Foo\Documents\Visual Studio 2019\projectname\bin\x64\Debug\AppX
Delete everything here, rebuild and you're good to go.
Since I don't see it here yet, here's what worked for me. I have a UWP project, Win32 project, and Windows application packaging project in the same solution. Running the Win32 app using FullTrustProcessLauncher.LaunchFullTrustProcessForCurrentAppAsync was giving this message and not working.
What fixed it was changing a setting in the packaging project's project settings:
Debug -> Debugger type -> Background task process: Native Only
I had same issue. Now in VS2022 you cannot download NetCore2.2.
So just download and install NetCore 2.2 from microsoft dotnet website.
https://dotnet.microsoft.com/en-us/download/dotnet/2.2
This error occurred when I tried changing C# projects in my solution to use Docker and running it:
The error went away when I changed the C# projects back to use the Visual Studio's debug server and running it:
In the Test Explorer window of Visual Studio 2019, make sure that there are no references to any *.testsettings or *.runsettings files if you are not using them intentionally. I had referenced a *.testsettings file unintentionally, and that was causing the issue.
For me, I'd just installed Visual Studio 2022 on a fresh installation of Windows 11. My project uses .Net 5, which wasn't installed by default (I only had .Net 6). I simply used the Visual Studio installer, modified my VS2022, selected Individual Components, and enabled .Net 5. Viola!
I started to get this error after updating Visual Studio from 2019 to 2022. It turned out that the project target framework was set to .Net Core 3.1, which was removed when I uninstalled VS2019, and the solution was to change it to .Net 6.0 which is the component I had selected during installation (Installing .Net Core 3.1 from the Visual Studio Installer should work as well).
To do so, right click on the project name and look for the "Target framework" option (my installation is in Spanish so that's what I presume it should say).
I've encountered this issue multiple times, using VS 2017 and VS 2019 across .NET Core 2.1, 3.1 and 5.0.
There are many conditions that can cause this problem to occur:
Microsoft Update can install a version of .Net Core at any time, automatically and outside of your awareness and knowledge.
It can also change the installation of any .Net Core SDK version's installed components.
Your version of VS has to be compatible with the version of the .Net Core SDK that you have installed.
You must have all of the following components installed for this error to be resolved/pre-empted for .NET 5.0 (please check the dotnet 5.0 site for the compatibility list by versions).
Microsoft .NET SDK 5.0.408 which includes (the following below) must all be installed and listed in the control panel:
.NET Core 5.0.17 Windows Desktop Runtime,.NET Runtime, Windows Server Hosting, Shared Framework
If any .NET Core 3.1 SDK are installed without your knowledge, you must uninstall it and repair your targeted .net core version's installation.
Solution found! Took awhile, installed ALL sdks, and ALL runtimes then reinstalled latest version I wanted!
Goal,
Have netcore 2.1 or greater as a dropdown option in visual studio. I've looked at possible duplicates questions already!
Details
After the last update of visual studio 15.7 to 15.8.4 .net core 2.1 or greater has disappeared from the target framework list.
I looked at other solutions as seen below. They were not helpful as I installed every version under the sun. See below screens.
Checked below for solutions (I already looked for solutions here!):
VS2017 : Target framework drop down does not show .NET Core 2.1 option
The current .NET SDK does not support targeting .NET Core 2.1. target .NET Core 2.0 or lower or use a vs of the .NET SDK that support NET Core 2.1
Referenced screens:
UPDATE1: Removed 2.2 preview (NOT SOLVED, 2.1 is still missing)
In general, when new preview version of .NET Core 2.X appears and you are getting the error like this:
The current .NET SDK does not support targeting .NET Core 2.X
Make sure that:
You have downloaded installed SDK and runtime you need. Run command dotnet --info to see what you have installed on your machine at the moment.
You have checked the Use previews of the .NET Core SDK option here:
-> Tools -> Options -> Projects and Solutions -> .NET Core
Sometimes you might need to restart your Visual Studio after checking the option.
Note: it's always better to have the most recent Visual Studio version installed on your development machine (sometimes you might need a preview version - note a Download Preview link).
The user said, that my comment fixed the issue. So I'll post it as answer:
On the picture I see a lot of installed .Net Core SDKs, maybe Visual Studio has some issues with so many installed SDKs.
So move all old SDK folders (1.0 preview, 2.0, 2.1 except 2.1.402) out of this folder to a backup location and launch Visual Studio again.
I had this issue as well, this is what I did and it worked for me, It may or may not for you. I uninstalled everything after 2.0. I then went to this link https://www.microsoft.com/net/download and downloaded both the SDK and Run-time downloads for 2.1 then after installing them I restarted my laptop and booted up VS2017. I then went and tried creating a new web app MVC and selected .netcore 2.1 it was there.
However keep in mind .netcore 2.1 is not yet available for every template you have so check web app MVC template first if its there then you have 2.1 it just may not be available for a specific template you might be trying to use it for yet.
Hope this helps
In my case solution was: i removed few .NET Core SDK:s from "Add remove programs" and restarted visual studio. Than SDK that i need was in the list
I'm having serious troubles in my Web Api project. I can't install entityframework nor update any of the updates to the project. Trying to update there gives me the error "package restore failed. rolling back package changes".
First of, I can't make a project with asp net core, only with the 1.1 version even though I have the correct version installed. See these two pictures.
As you can see it is installed.
When I try to update these:
I get this error:
Trying to install entity framework gives me:
How can I upgrade my project to asp net core 2.0 or atleast make a new 2.0 project?
Support for ASP.NET Core 2.0 was added in Visual Studio 2017 version 15.3 (see the original accouncement).
Your first error is due to the fact that ASP.NET Core 2.0 is not compatible with .NET Core 1.1. You'll need to target .NET Core 2.0 (netcoreapp2.0) for this, as you've attempted to do. Upgrading to Visual Studio 2017 version 15.3 will allow you to do that, as I mentioned above.
Your second error is due to the fact that Entity Framework 6.1.3 is not compatible with .NET Core 1.1 (or, in fact, any version of .NET Core). In order to use Entity Framework in a .NET Core project, you will instead need to use Entity Framework Core (nuget). This is an entirely new version of Entity Framework, so make sure you check out the differences if you haven't already.
firstly check dotNetCore version
Open Command Prompt and run this dotnet --version
install dotnetCore framework lastest on here
alternatively you can update the visual studio
I have installed Visual Studio 2015 update 3 and have installed the latest Web Essentials update and also have installed DotnetCore version. But when I create a new asp.net project, only asp 4 templates like in the image are available
create form image
First of all, there is no ASP.NET 5 anymore. It has officially been renamed to ASP.NET Core 1.0.
You seem to have missed that announcement, which would have made the selections in Visual Studio more obvious. When you choose File > New Project..., you get to a dialog that gives you a choice to go with ASP.NET Web Application (.NET Framework), ASP.NET Core Web Application (.NET Core) or ASP.NET Core Web Application (.NET Framework). This is the dialog before the one you have posted a screenshot of.
NOTE: In order to see all 3 of these options, you need to choose at least .NET Framework 4.5 from the dropdown.
The last two options are for the new ASP.NET Core 1.0 framework. The first of which is to run on the .NET Core library (cross-platform) and the last which is for the .NET Framework 4.6.1 library (which is not cross-platform).
Of course, if you choose ASP.NET Web Application (.NET Framework) , you get a regular MVC 5 or Web API 2 application.