title: Clearing all data from data grid view
body: <p>I have three data grid views I am processing data and showing it on first then taking from first and processing and showing on second, Now I want to reuse my first data grid view but it is not clear, it has old data which makes problem means old columns and values.I have tried: </p>
  
  <pre><code>    datagridview2.datasource=null;   // didn't  work
      datagridview2.columns.clear();   // didn't work 
  </code></pre>
  
  <p>I want data grid view to be <em>clear</em> as new , please help</p>