Add PSI Web Reference in Solution file

Add PSI Web Reference in Solution file. You can access project web app using PSI within an environment. PSI code is totally server side code.

For Example, some reference as I mentioned below.

For Projects

http://ServerName/ProjectServerName/_vti_bin/psi/project.asmx?wsdl

For Custom Fields

http://ServerName/ProjectServerName/_vti_bin/psi/customfields.asmx?wsdl

You can create a reference with help of references screen.

How to Add a reference in your solution watch video