I am very poor in registry operation. I have given full idea
Manual Operation. : -
Start Registry Editor
Locate the following key:
Locate the key to be deleted by locating the key
name created by the program. If the name of the key is not apparent, browse
through each key and note the value for DisplayName. This is the viewable
string in the Add/Remove Programs tool.
Using the Registry menu, export the selected
registry key to make a backup. Store the .reg file in a safe location in case
you need to import it at a later date.
Delete the selected registry key and its values.
Do not delete the entire Uninstall key.
Quit Registry Editor.
Verify that the reference in the Add/Remove
Programs tool is no longer visible.
Now do this in your C# application
Find the subkey which you want to delete ,from this location
And then delete it Entry.