title: Imports System.Data.SqlClient .... Imports System.Data ....?
body: <p>i am using both VISUAL WEB DEVELOPER 2010 &amp; VISUAL STUDIO 2012 EXPRESS EDITION.
  While writing WINDOWS FORMS APPLICATION ... i used only one statement to work with DataSet,DataTable and Datarow.It is,</p>
  
  <pre><code>Imports System.Data.SqlClient
  </code></pre>
  
  <p>But while developing WEB APPLICATIONS in ASP.NET using VISUAL WEB DEVELOPER 2010 , i had to use 2 statements.They are,</p>
  
  <pre><code>Imports System.Data.SqlClient
  Imports System.Data
  </code></pre>
  
  <p>If i did not import <strong>System.Data</strong> , <em>DataSet, DataRow, DataTable</em> are not being recognized.
  What is the reason..??
  I heard that BASE CLASS LIBRARY ( BCL ) is same for both windows &amp; web application..??</p>