title: SQL Server with Unity3D
body: <p>I want to use SQL Server with Unity. I add <code>System.Data.dll</code> to assets in Unity project but I get this error:</p>
  
  <blockquote>
    <p>The type or namespace name 'SqlClient' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)</p>
  </blockquote>
  
  <p>Then I added <code>sqlclient.dll</code> to the assets folder, but I still get:</p>
  
  <blockquote>
    <p>The type name 'SqlConnection' could not be found in the namespace 'System.Data.SqlClient'. This type has been forwarded to assembly 'System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.<br>
    Consider adding a reference to that assembly.</p>
  </blockquote>
  
  <p>Please help me! What's wrong?</p>