can't set radio button to checked in group via webbrowser control

[peterg2000]

Having trouble setting a radio button via a webbrowser control in visual basin .net. This is the HTML code I'm trying to act upon!

<td align="right">
Afficher statuts&nbsp;:
</td>
<td>

<label for="Company">
<input type="radio" id="Services" value="true" name="requestinfo_0" />
Company
</label>

<label for="Partener">
<input type="radio" id="Workload" value="false" name="requestinfo_0" />
Partener
</label>

<label for="All">
<input type="radio" id="All" value="" name="requestinfo_0" />
All
</label>
The suggested solution I found searching shows it should work like this! But doesn't!

WebBrowser1.Document.GetElementById("Workload").SetAttribute("Checked", True)
But I believe I would need to specify the name as well as from what I can tell its possible to have more than 1 ID as Workload but in a radio button with a different name. But I can't see where or how to write the code accordingly!

I'm doing this in Visual studio 2019 in Visual basic!

Thanks Pete