Why powershell command delete my nuget packages which the same command requires?

Question

I run this command

dotnet ef dbcontext scaffold "Server=.\SQLEXPRESS;Database=DB-Name;Integrated Security=true" Microsoft.EntityFrameworkCore.SqlServer

in PowerShell in the same directory as my project. I get an error that I need the following packages:

Microsoft.EntityFrameworkCore.Design, Microsoft.EntityFrameworkCore.SqlServer

I installed them and run the same command again. Then my packages were uninstalled and I get the same error.

Can you tell me what the problem could be? I am on Windows 7 if that matters

Answer 1

I have installed the packages from nuget in Visual Studio. Now I tried to do that via powershell and I succeeded. I've no idea why that happened.