Mahapps.metro: Can't Load Solution With VS2019

Created on 23 Aug 2019 · 17Comments · Source: MahApps/MahApps.Metro

tried to following steps from here, but solution still does not rebuild.
https://github.com/MahApps/MahApps.Metro/wiki/Building-the-MahApps.Metro-solution

_Must be a dependency or installation, but i dont know which one_

errors from vs2019
D:\DEV\MahApps.Metro-develop\src\MahApps.Metro\MahApps.Metro.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

D:\DEV\MahApps.Metro-develop\src\MahApps.Metro.Samples\MahApps.Metro.Demo\MahApps.Metro.Demo.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

D:\DEV\MahApps.Metro-develop\src\MahApps.Metro.Samples\MahApps.Metro.Caliburn.Demo\MahApps.Metro.Caliburn.Demo.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

D:\DEV\MahApps.Metro-develop\src\Mahapps.Metro.Tests\MahApps.Metro.Tests.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

D:\DEV\MahApps.Metro-develop\src\MahApps.Metro\MahApps.Metro.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

what i have done yet:

vs2019 installed
net core sdlk 3.0.100 preview6(x64)
frameworks installed (4.5.2, 4.7.2, 4.8)

so what can i do to check what im still missing ?

Source

benjamin275

Most helpful comment

problem solved. On my maschine i had win10. i opened solution there, where it more exactly says which things failed. On win7 i only had the mentioned error messages.
after get it worked on win10 i returned to win7. There now i get more errors messages. Adapted to them, had to remove compiler errors on build for WpfAnalyzers/Fody because of downgrade and so on...installed framework 4.7(MUST be developted pack, runtime was not enough).... now it worked

benjamin275 on 27 Sep 2019

👍2 ❤1

All 17 comments

@benjamin275 I am not a programmer by profession, so I cannot definitiv say what your solution would be. But what I did when I had a similar issue was:

Reinstall all Nuget-Packages: Update-Package –reinstall (see https://docs.microsoft.com/de-de/nuget/consume-packages/reinstalling-and-updating-packages)
Clean the solution
Delete these folders: ...\bin\ and ...\obj\
Rebuild the solution (sometimes you need to do it twice, don't ask me why)

If this doesn't help, someone else needs to help you.

Happy coding, Tim

timunie on 26 Aug 2019

point one says:

PM> Update-Package –reinstall
Update-Package : Project 'Default' is not found.
At line:1 char:1

Update-Package –reinstall
~~~~~
- CategoryInfo : ObjectNotFound: (Default:String) [Update-Package], ItemNotFoundException
- FullyQualifiedErrorId : NuGetProjectNotFound,NuGet.PackageManagement.PowerShellCmdlets.UpdatePackageCommand

Point 2:
project is not yet loaded, so i dont have an clean solution option available

....

benjamin275 on 26 Aug 2019

Have you tried this in the Solution Folder with VS closed?

Delete these folders: ...\bin\ and ...\obj\

This is my last idea, sorry. I hope someone else could help you.

Happy coding,
Tim

timunie on 26 Aug 2019

not possible, there is not even such folders, because i was not able to even load the project, either rebuild them

benjamin275 on 26 Aug 2019

@benjamin275 Which VS 2019 have you installed? (16.x.x)

punker76 on 26 Aug 2019

16.2.3

benjamin275 on 26 Aug 2019

Sorry, I’m a bit late to this thread. I’m using VS2019 with Mahapps metro
and not having any problems. I’ve lost the earlier e-mails what errors are
you seeing in the output window when you attempt to load the project?

On Mon, 26 Aug 2019 at 15:55, benjamin275 notifications@github.com wrote:

not possible, there is not even such folders, because i was not able to
even load the project, either rebuild them

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makingbloke on 26 Aug 2019

Sorry, I’m a bit late to this thread. I’m using VS2019 with Mahapps metro and not having any problems. I’ve lost the earlier e-mails what errors are you seeing in the output window when you attempt to load the project?
…
On Mon, 26 Aug 2019 at 15:55, benjamin275 @.*> wrote: not possible, there is not even such folders, because i was not able to even load the project, either rebuild them — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#3581?email_source=notifications&email_token=ABPMCPMMCADHL6MON6L3XQ3QGPVGNA5CNFSM4IPDCLQKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5ET3MA#issuecomment-524893616>, or mute the thread https://github.com/notifications/unsubscribe-auth/ABPMCPKTRH6TGRMWR2NQKHLQGPVGNANCNFSM4IPDCLQA .

errors from vs2019
D:\DEV\MahApps.Metro-develop\src\MahApps.Metro\MahApps.Metro.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

benjamin275 on 27 Aug 2019

@benjamin275 I have searched a bit on the web regarding your problem. It could be an issue with your Installation of .NET-Core or VisualStudio itself. Have a look at the first search results:
https://www.google.com/search?q=he%20project%20file%20cannot%20be%20opened%20by%20the%20project%20system%2C%20because%20it%20is%20missing%20some%20critical%20imports%20or%20the%20referenced%20SDK%20cannot%20be%20found.

Happy coding
Tim

timunie on 27 Aug 2019

still the same problem:

repair VS2019, does not help
did the gac uninstall MSBuild stuff
check the global.json, which has 3.0.100-review; same as installed Core on my computer
installed all in x86 (sdk 3.0.100 preview6, sdk 2.2.401, runtime 3.0.0 Preview 6)

benjamin275 on 27 Aug 2019

I tend to remove the projects I’m not using from the solution. Try opening
the projects one at a time and seeing which one fails. My guess is you
haven’t installed a required SDK so doing a repair won’t make any
difference. You need to find out which sdk is missing and add it with the
VS installer.

On Tue, 27 Aug 2019 at 09:21, benjamin275 notifications@github.com wrote:

still the same problem:

repair VS2019, does not hellp

did the gac uninstall Build stuff

check the global.json, which has 3.0.100-repview; same as installed
Core on my computer

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makingbloke on 27 Aug 2019

yeah i also was on that, i even tried to create a new wpf application. At first im only interested in the Metro-Examples. So i tried to add existing project to the new one, which also failed.

yeah i tried to experimented also installing sdk`s. But did also not work.

error still remain as initially posted:
D:\DEV\MahApps.Metro-develop\src\MahApps.Metro\MahApps.Metro.csproj : error : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found

benjamin275 on 27 Aug 2019

.NET Core SDKs installed: dotnet --info
2.2.108 [C:\Program Files (x86)\dotnet\sdk]
2.2.205 [C:\Program Files (x86)\dotnet\sdk]
2.2.301 [C:\Program Files (x86)\dotnet\sdk]
2.2.401 [C:\Program Files (x86)\dotnet\sdk]
3.0.100-preview6-012264 [C:\Program Files (x86)\dotnet\sdk]

benjamin275 on 27 Aug 2019

also tried x64 versions, no success either.... :(