How to import all xml files to gridview

Question

I am doing windows application. here my requirment is 

 1) I have one folder , in that folder all xml files are there.
    now I want show all xml files in gridview when ever click on the button.

  Here all xml files structure is same.


 2) Here also I have on folder in drive. I have one checked list box and button
      In page load i want to display all Xml files in Checked list box after that 
      I will select multiple files in checked list box. 
     When ever click on the button , I want to show those xml files in gridview.


Please provide the code.