title: Radio button checked property issue
body: <p>My Html code is as below.But always checked final option button as selected one.How can I fixed this?</p>
  
  <pre><code>&lt;div id="employee" style="margin: 7px 0;"&gt;
              &lt;div&gt;
                     &lt;input id="james-johnson" type="radio" name="employee" value="james-johnson" checked="checked"&gt;&lt;label for="james-johnson"&gt;James Johnson&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="boss-hog" type="radio" name="employee" value="boss-hog" checked="unchecked"&gt;&lt;label for="boss-hog"&gt;Boss Hog&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="jake-sanders" type="radio" name="employee" value="jake-sanders" checked="unchecked"&gt;&lt;label for="jake-sanders"&gt;Jake Sanders&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="dawn" type="radio" name="employee" value="dawn" checked="unchecked"&gt;&lt;label for="dawn"&gt;Dawn&lt;/label&gt;
                 &lt;/div&gt;
  
          &lt;/div&gt;
  </code></pre>
  
  <p>ASPX Code is as below</p>
  
  <pre><code>&lt;div id="employee" style="margin: 7px 0;"&gt;
              &lt;% foreach (var employee in Model.Provider.Employees)
                 {  %&gt;&lt;div&gt;
                     &lt;input id="&lt;%: employee.Key %&gt;"
                         type="radio" name="employee" value="&lt;%: employee.Key %&gt;" checked="&lt;%:employee.IsEmployeeSelected ?? "unchecked" %&gt;" /&gt;&lt;label for="&lt;%: employee.Key  %&gt;"&gt;&lt;%: employee.Name%&gt;&lt;/label&gt;
                 &lt;/div&gt;
              &lt;% } %&gt;
          &lt;/div&gt;
  </code></pre>
  
  <p><strong>UPDATE (When I applied @Satpal method):</strong></p>
  
  <pre><code>&lt;div id="employee" style="margin: 7px 0;"&gt;
              &lt;div&gt;
                     &lt;input id="james-johnson" type="radio" name="employee" value="james-johnson" checked="checked"&gt;&lt;label for="james-johnson"&gt;James Johnson&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="boss-hog" type="radio" name="employee" value="boss-hog" checked=""&gt;&lt;label for="boss-hog"&gt;Boss Hog&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="jake-sanders" type="radio" name="employee" value="jake-sanders" checked=""&gt;&lt;label for="jake-sanders"&gt;Jake Sanders&lt;/label&gt;
                 &lt;/div&gt;
              &lt;div&gt;
                     &lt;input id="dawn" type="radio" name="employee" value="dawn" checked=""&gt;&lt;label for="dawn"&gt;Dawn&lt;/label&gt;
                 &lt;/div&gt;
  
          &lt;/div&gt;
  </code></pre>