Question

with a Server-sided call, which method is faster in hiding the Control?

Control.Hide();

or

Control.hidden = true;

Given the case we have something like:

<ext:Button runat="server">
   <DirectEvents>
      <Click OnEvent="hidethis"/>
   </DirectEvent>
</ext:Button>

and:

public void hidethis(object sender, DirectEventArgs e)
{
    var Control = sender;
    // above Choice
}

Answer 1

Digging into Ext.Net Documentation, I found :

Hidden Property Render this component hidden (default is false). If true, the hide method will be called internally.

So calling Hide() is faster since the Hidden property calls the method Hide() anyway.