title: Check if value in controls was changed from the orginal data on button click
body: <p>I have a page with different controls (checkboxes,textareas, ddls..etc), On pageload the data is loaded into controls.</p>
  
  <p>What would be a good approach to check if the data was modified from the original data after the button was clicked. Using c#.</p>
  
  <p>Thanks,</p>