[MonoDevelop] How to add Form/Resource files to a project in MonoDevelop?

[Chen, Feng]

Hi MonoDevelop users,

I want to add two external files, Form1.cs and Form1.resx, to my project.
When I use "Add Files" to select those two files, choose the "Link" options, those files are added as two separate files. 

How to make the .resx file "dependupon" the related .cs file so that those two files are displayed as one node?

I am using MonoDevelop 2.2.2 on Mac 10.6.4.

Thanks.

Feng Chen