There are thousands of samples on the internet -
Google search including vb.net[
^]
More generic Google search[
^]
The second link is better. Why? Because instead of just providing you with code to copy (which your tutor will mark you down on), it includes general instructions on
how to apply the pattern in
any language
When you have written some code come back if you get stuck. But I'm sorry, this is not a tutorial forum