In Windows application Tag Property of radio button (controls) is useful as like value field of controls in web Application
I don't have so much experience in windows application.. at that time i have gone through internet for Value Filed property of Controls in windows application. but i haven't find any link then i have gone through Property windows of Radio Button (any control).then I used that TAG property like a value field as we are using in web application. I used it in one of my desktop application.see this one of the step of XML Operation(XMLNodeIterator) for eg. rbButton.Tag = (object)xNodeIterator.Current.GetAttribute("ansId", "");