Project 'Default' not found error when installing a NuGet package

Such an error occured to me, I fixed it simply by choosing the project at the console

Simple solution, but I just restarted VS 2017 and I was able to run the Add-Migration "XXXXXX" command.

I fixed this by closing down VS and reopening the solution. Now I can install packages with Nuget.

Also someone said something about choosing the project from the drop-down as the default project, My drop-down was blank. In case the problem you are having is similar...try restarting the solution. Worked for me

try this:

1. Open a command prompt in the root source directory of your application (where "project.json" is)

2. Run

   dotnet ef migrations add MyFirstMigration
   

   and

   dotnet ef database update
   

For your packages try to edit your "project.json" file and add new dependencies and run:

dotnet restore

Look at:

• https://docs.efproject.net/en/latest/miscellaneous/cli/dotnet.html for the ef tool documentation.
• https://learn.microsoft.com/en-us/dotnet/articles/core/tools/dotnet-restore for the restore documentation.
• https://learn.microsoft.com/en-us/dotnet/articles/core/tools/project-json#dependencies for the "project.json" documentation

that nuget you want to install is not compatible with current project framework

• right click on project name at solution explorer panel and choose properties
• in the application tab change target framework to newest one.
• close and try again to install-package

The fix for me was to open project with the .sln solution file. Initially I had initially opened my project with the 'Open Folder' option, which caused the "Project 'Default' not found" error when trying to install packages.

It could happen when your project’s path is too long. Simply rename folder to shorter one or move your solution to another place.

In my case this happens after removing of "Applications insight for VS2015". Installing back of "Applications insight for VS2015" fixed the issue.

In some cases, if we close the project and open it again, the problem will be solved . The reason is that the migration command is not reloaded, thanks to Visual Studio .

I had an issue where I installed some packages already but they weren't working. Naturally, I tried to re-install the packages and the same error came up for me. Turns out; problem was me not opening the .sln (solution) file.

Its Important to point out that you have to load your project through the .sln file or you'll probably get the Project "Default" is not found error. One solution on here says to

I fixed this by closing down VS and reopening the solution. - @Preye.

While it worked for me, it confused me at first because I thought it meant to reopen the project. I had to open the project by means of the solution file.

This is an error on NuGet's GitHub:

Error installing package to PowerShell project with poor error

I got the same error trying to use NuGet as my package manager for a project that is not .NET

You also get this message when your project has build errors ... Package manager Console does a build.

Fix the build errors and "project 'Default' not found" goes away.