title: On Button Click Validate The Radio Button Group in C#
body: <pre><code>&lt;asp:RadioButton ID="RadioButton1" runat="server" Text="A" GroupName="rbn" /&gt;
  &lt;asp:RadioButton ID="RadioButton2" runat="server" Text="B" GroupName="rbn" /&gt;
  &lt;asp:RadioButton ID="RadioButton3" runat="server" Text="C" GroupName="rbn"/&gt;
  &lt;asp:RadioButton ID="RadioButton4" runat="server" Text="D" GroupName="rbn"/&gt;
  &lt;asp:Button ID="Button1" runat="server" Text="Validate" OnClick="Button1_Click" /&gt;
  &lt;asp:Label ID="Label1" runat="server" Text=""&gt;&lt;/asp:Label&gt;
  </code></pre>
  
  <p>On Click Button <code>Validate</code> it Should Validate The Radio Button group <code>rbn</code> and shows the Checked Radio Button Text in <code>Label1</code>.</p>
  
  <p>This Should Done In C#. Pls Don't Use any Script's and for loop.</p>
  
  <p>Help Me Out Of this Problem and Thanks In Advance</p>