title: How to add SQL Server database file (.mdf) in Visual Studio without installing SQL Server Express Edition?
body: <p>I have an error below adding an <code>.mdf</code> file (SQL Server Database) in a Visual Studio 2010 project</p>
  
  <blockquote>
    <p>Connections to SQL Server database files (.mdf) require SQL Server
    2005 Express or SQL Server 2008 Express to be installed and running on
    the local computer</p>
  </blockquote>
  
  <p>I don't want to install SQL Server Express (2005/2008) because I have already installed
  SQL Server 2005 Enterprise Edition</p>
  
  <p>I am using Visual Studio 2010 Ultimate</p>