title: username , password and other parameters in sqlserver connection string
body: <p>I'm new to C# and .net and just worked with php and mysql.<br>
  to connect to sqlserver express (in visual studio 2010) with c# we should provide a connection string that has lots of formats i found on the web specially in <a href="http://connectionstrings.com" rel="nofollow">connectionstrings</a>.<br>
  for example in standard format :<br>
      "Data Source=myServerAddress;Initial Catalog=myDataBase;UserId=myUsername;Password=myPassword;"  </p>
  
  <p>what is username and password? where can i find them? are they "root" and "" like in php mysql or something else?    </p>
  
  <p>as mentioned , i have created a database named "db.sdf" in sqlserver express in visual studio 2012.  </p>
  
  <p>I'm really confused. please help.     </p>