Question

I have two radio buttons, in the same group name, users selects either one (by default none is checked). When the user selects either one a string variable should store the content of the radio button. How to achieve this?

Answer 1

First double click on the radiobutton(s) to get their checked events
Then inside the eventhandler write this

<RadioButton Content="foo" Checked="radioButton1_Checked" />
<RadioButton Content="bar" Checked="radioButton1_Checked"/>

private void radioButton1_Checked(object sender, RoutedEventArgs e)
{
   variable = (string)(sender as RadioButton).Content;
}