I am working in vb.net in that i need to get all the data of gridview column number2 and store it into dictionary.
please give a solution it is urgent
It's unclear what you need here. In psuedo code you would
'psuedo code here create the dictionary object loop through the grid and for each item dictionary.add (item from grid)
There are plenty of example code for getting at the grid data and use of the VB.net Dictionary on the web now.
Be sure to read https://www.daniweb.com/programming/threads/435023/read-this-before-posting-a-question before you reply.