I want ti change the Security Settings in visual studio 2010 . but in my project-> properties -> security tab missing.

I want ti change the Security Settings in visual studio 2010 . but in my project-> properties -> security tab missing.

I answered this here: Why am i not seeing the security tab in my Office Solution properties?
and here is my answer re-posted:
I had the same issue and the solution was super annoying to figure out. Someone on another website mentioned that the Security tab is only relevant for certain types of ClickOnce applications so I started playing around with various options and figured it out.
In the Application tab, for Application Type, select Windows Forms Application from the drop-down menu (other drop-down options might also work but haven't tried them)
Save everything: In the main menu bar of Visual Studio, click File > Save All.
Close your project Properties window (i.e. the one with the Application tab that we were just modifying)
Open your project Properties window again: in your Solution Explorer, select your project, go to the main menu bar, click Project, click Properties.
Voila! It should be there. :)