connectionString
A ConnectionString is a string used by an application to specify how to connect to a data source. It encodes the data provider, the location of the data source, and authentication details so a driver or framework can open a connection.
A connection string typically includes components such as the data source or server address, the database name,
Formats and conventions vary by platform. In .NET's ADO.NET, a connection string is a semicolon-delimited list
Security and management: credentials are sensitive and should not be hard-coded; prefer integrated security or secure
See also: connection pooling, authentication, environment variables, configuration management.