Error when trying to use Nuget to get System.Data.SqlClient

Question

I have two projects in my solution. One is using .Net 5.0 and the other is using .Net Framework 4.5

When I tried to add code that will call a stored procedure I was told that I needed to get a new version of System.Data.SqClient dll.

I selected to install 4.5 and at the end of the installation process I received the following error:

Could not install package 'System.Data.SqlClient 4.5.0'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.5', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

I am unable to "update" the project that is using 4.5 to use 5.0 because the "highest" version displayed s 4.7.2 image 1

I'm thinking I chose the wrong type of project and that is the problem but I'm not sure.

Any help would be greatly appreciated.