title: Can't edit in sql database in Visual studio 2013
body: <p>I use SQL Server 2008 R2. I made a database in the SQl management studio and I designed the table. 
  When I opened the database in Visual Studio 2013 I couldn't edit anything in the database. </p>
  
  <p>See this pic:</p>
  
  <p><img src="https://i.stack.imgur.com/z43Gs.jpg" alt="Embedded Image"></p>
  
  <p>What should I do ?</p>