[DotNetDevelopment] Data accessible to all forms

[Nacho108]

Hi everyone,
I'm trying to create an structure so it can be seen from all forms. So
doing a bit of research I decided to create an static property of the
main class of the program.

For this I've made this code:

namespace WindowsApplication1
{
    static class Program
    {
        public struct Seleccion
        {       public bool x;
                public bool y;         }

        private static Seleccion sel_activa ;

        public static Seleccion _sel_activa
        {        get { return Program.sel_activa;}
                 set { Program.sel_activa =value; }        }

        static void Main()
        {  Program.sel_activa = new Seleccion();
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());        }
} }

and after doing this I try to access the property from one form like
this:

Program._sel_activa.x = B02.Checked;    (B02 is a check box)

and VS throw me an exception:
"Cannot modify the return value of
'WindowsApplication1.Program._sel_activa' because it is not a
variable"

Can somebody help with this?

By the way this is the link of the article I've taken from the
information.
http://bytes.com/groups/net-c/263680-accessing-same-data-multiple-forms-using-c

Thanks in advance!