Visual Studio 2019 project unloaded

Question

Visual Studio 2019 project unloaded

leo del ciello 66

Hello,

I have a solution developed for VS 2019.
This solution contains 4 projects.
Whenever I open the solution, one of these projects cannot be loaded : I end up having a warning in the branch corresponding to the project, which says "The project has been unloaded": and the project tree is empty.
All the other three projects are loaded correctly and show their branches.
If I browse with explorer to the corresponding folder I can correctly find the project file and all the files the make up the project.
If I open the project file I cannot see anything strange (as far as I can understand).
I just see in the unloadable project's ".csproj" file that a tag like :

is present, but by removing it, nothing changes.
There are other tags present, which are not present in the other functioning project's ".csproj", but they are empty.
I find this problems popping up periodically and random.
I even realigned VS 2019 to the latest update, but with no effect on this problem.
What could be the reason ?
I am loading everything as an Administrator, since in the past I had this same problem with some other projects and at that time it seems loading as an Administrator solved them.
But now its happening again.
Can anyone help me ?
Thanks in advance

Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-05-26T07:38:44.24+00:00

For the problem project, are there any NuGet packages installed?
leo del ciello 66 Reputation points

2022-05-26T08:06:28.273+00:00

I guess so but I am not sure : i took this project from a Git Repo.
Is there any way to check if some of the included assemblies come from Nuget ?
Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2022-05-27T09:14:53.167+00:00

Hello @leo del ciello , "The project has been unloaded" => sounds like if you try to reload it, it will then work(right-click the project in Solution Explorer > Reload Project)?
Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-05-27T12:20:30.563+00:00

If .NET Core, double click the project node in Solution Explorer to see. Also, you can provide the GitHub repository link so we can see if there is a problem without cloning the repo.
leo del ciello 66 Reputation points

2022-05-27T15:02:51.823+00:00

Already tried but doesn't work : i end up having a popup which says that's not possible to complete the operation because the path has not been found .
But the path actually exists and all the file which make up the project are present.

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Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-05-26T07:38:44.24+00:00

For the problem project, are there any NuGet packages installed?
leo del ciello 66 Reputation points

2022-05-26T08:06:28.273+00:00

I guess so but I am not sure : i took this project from a Git Repo.
Is there any way to check if some of the included assemblies come from Nuget ?
Tianyu Sun-MSFT 34,441 Reputation points Microsoft External Staff

2022-05-27T09:14:53.167+00:00

Hello @leo del ciello , "The project has been unloaded" => sounds like if you try to reload it, it will then work(right-click the project in Solution Explorer > Reload Project)?
Karen Payne MVP 35,586 Reputation points Volunteer Moderator

2022-05-27T12:20:30.563+00:00

If .NET Core, double click the project node in Solution Explorer to see. Also, you can provide the GitHub repository link so we can see if there is a problem without cloning the repo.
leo del ciello 66 Reputation points

2022-05-27T15:02:51.823+00:00

Already tried but doesn't work : i end up having a popup which says that's not possible to complete the operation because the path has not been found .
But the path actually exists and all the file which make up the project are present.

Answer 1

Bruce (SqlWork.com) 78,006 Volunteer Moderator

project typically don't load for a couple reasons

1) the required visual studio workload is not installed
2) syntax error in project file
3) project file is too old a version for the current visual studio version
4) the solution file and project file are out of sync

after opening the solution, right click on the project and select load, it should report the error.

the first step is to get the project to load. open the project directly with visual studio, not thru the solution. fix any errors.

once this works, reopen the solution. if the project still won't load try:

remove project from solution and close solution
reopen solution
re-add the project to the solution
update project dependencies

leo del ciello 66 Reputation points

2022-05-30T07:03:07.027+00:00

Ok I guess I understood where the problem is : in the .csproj file there are two tags that are related :

<PropertyGroup>
<UseIISExpress>true</UseIISExpress>

and

<ProjectExtensions>
<VisualStudio>
<FlavorProperties GUID="{349c5851-65df-11da-9384-00065b846f21}">
<WebProjectProperties>
<UseIIS>True</UseIIS>

It seems that if, for any reason , the two tags have different values (one true and the other false) , the project doesn't load.
In my case the first one was false and the second true : once I put the first one to true as well, the project loaded correctly.
Thank you

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Visual Studio 2019 project unloaded

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