Interfaces IDbConnection , IDbCommand , etc. have been removed from the System.Data.Common namespace in .NET Core. They have been replaced by the abstract classes DbConnection , DbCommand , etc. You can read the discussion on this subject here .
You can see the .NET Core progress for System.Data.Common here . In the future, if you are not sure if the types have been moved or deleted, this may be a good place to check.
The NuGet package you want to install is System.Data.Common , which contains the specified types.
source share