This blogpost explains how to connect .NET Core Console application to SQL server database and read table data. You will not be using the Entity framework for this.

A lightweight, document-oriented (NoSQL), syncable database engine for .NET - couchbase/couchbase-lite-net ...

The database will act as your central repository providing details of all the contracts that your institution has in place. It will need to include details for each contract such as the start and end ...