I Have 15 Forms on My Software, I Want to Create 2 Setups First With 10 Forms and 2nd With 5 Forms, These Both Setup Willbe Installed on Diffrent PC, Please Suggest Me How It May Be Possible...

Split your project into 2 separate projects or right click on the forms you don't want and choose exclude from project once you have a setup done copy it to a different folder then change which forms are in the project and build the setup again.

Personally I'd choose using 2 separate projects. This will make any future updates much easier. if you're worried about common classes, functions, etc., put all 4the common code in a code library and compile it to a .dll. Use a unique namespace, then add a reference to the .dll and imports the namespace.