how to add an existing project in asp.net ?its urgent

Question

hi frnds

 

how to add an existing project in asp.net ..I tried by can be able to do add project.

 

please tell me by step by step ..

 

 

i followed things like --- create project --go to solution explore--add --existing project--go to location-like D derive--folder

 

 

here not be able to do