PropertyGrid Discard values

Hi,

I changed the text field bcoz of which the PropertyValueChanged event
fired up. But I wanted to get back the old value of a text in a
property grid, after clicking on a discard button.

I already have stored the attribute and the old value in variables.

What would I need to do, in order to get back the old value on the
client page itself, on a button click.

Thanks for any help.

.