How to change Connection String in Entity Data Model in Visual Studio 2012
I Can Not Change Connection String in Visual Studio 2012 Help Me
Entity Data Model in Visual Studio 2012 Difference With Old Version
How to change Connection String in Entity Data Model in Visual Studio 2012
I Can Not Change Connection String in Visual Studio 2012 Help Me
Entity Data Model in Visual Studio 2012 Difference With Old Version
If you remove the connection string from the app.config file, re-running the entity Data Model wizard will guide you to build a new connection.
From: How should I edit an Entity Framework connection string?