Npgsql is installed per project. To uninstall it, follow the procedure below:

• Linux

  Remove a package reference to the project file.

  dotnet remove projectFilePath package Npgsql

• Windows(R)

  1. In Visual Studio, open a project for which Npgsql is installed.

  2. Click [Tools] >> [NuGet Package Manager] >> [Manage NuGet Packages for Solution].

  3. Select all the projects that have Npgsql installed, and then click [Uninstall].
     Alternatively, if the plugin packages have been removed and is no longer installed, in the solution explorer open the Dependencies/NuGet node and delete the plugins that require uninstallation.