During the adaptation process, when separating the packages into the appropriate framework target ItemGroups, it may be necessary to also add the following into the first, framework-agnostic ItemGroup:
<PackageReference Include="System.Data.SqlClient" Version="4.9.0" />
where Version is replaced with the appropriate version available from NuGet.
Attempting to use the Microsoft.Data.SqlClient package may result in namespace inconsistencies, depending on scenario.