Can You Import 1 Finished C# Project Into Another C# Project

[C# Programming]

is it possable to import another program i built in c# into a diffrent c# project

so that i have my main program then a sub program inside


ive built a web browser and download manager in to seperate projects
id like to put a the two together to make one program

http://tinypic.com/view.php?pic=6jpvkh&s=5[^ (http://tinypic.com/view.php?pic=6jpvkh&s=5)]

Ive also tried everything to post a screen shot but the html in there some copy it to browser to see what i mean