Connection String Error "Missing its statement block"

I am using the updated Nuget Package Manager Console in Visual Studio to scaffold models from a database I've connected from named Sail. When I enter the connection string into the Package manager console.

PM> Data Source=localhost;Initial Catalog=Sail;Integrated Security=True

I receive the following errors:

At line:1 char:12+ Data Source=localhost;Initial Catalog=Sail;Integrated Security=True;  ...The Data section is missing its statement block.