c# +wpf tray icon break

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C#

WPF

C#4.0

hello

i used in wpf tray icon from windows.wi.forms for example named Notify1.
i add to the resources a icon and when i set the Notify1 is icon like this:

Notify1.Icon = new System.Drawing.Icon("icon1.ico");

i get error while debug;

but if i write the full path the error don't accord.

Environment.CurrentDirectory.Replace(@"bin\Debug", "") + @"Resources\Icon1.ico"

why?! and how to fix?

thanks