Object Reference Not Set After Copying Mobile.browser
Why am I getting "Object reference not set to an instance of an object."?
If after copying the .browser file into your AppBrowsers folder you get a compile error “Object reference not set to an instance of an object.” and you have .NET 3.5 SP1, then the issue is likely that you must create a sub-directory (of any name) in your AppBrowsers folder and place the .browser file in there. E.G. \App_Browsers\MobileBrowserData\mobile.browser