title: How to know if a List<Object> is modified or an item changed?
body: <p>I have a <code>List&lt;&gt;</code> that is populate with data of a database, after of that an event of a gridview is activated. Then the items of the list can be modified, changed or eliminated.  </p>
  
  <p>Then I want to know how I can determinate if this item or items was altered without go to the database, if this is possible?  </p>
  
  <p>The data in the aspx page is in a Gridview.</p>