So, just to clarify....are you saying that you want a dialog similar to Firefoxes or IE's when you click a link to a file and it has two radio buttons...one for Open file and one for Save file?
There may be controls out there to do that, but I'm not familiar with them. But, it wouldn't be that difficult to implement.
If you're wanting to know how to choose which program to use, this article (
Get Registered File Types and Their Associated Icons in C#[
^]) shows you how.
It may be out there, but I don't think you're going to find exactly what you're looking for. Just create it yourself!