Loading usercontrol on runtime and reloading the page
<p>On my page I have a placeholder where I load a usercontrol when I select an item in dropdownlist. </p>

<pre><code>protected void ddlLoadCtr_SelectedIndexChanged(object sender, EventArgs e)
{
    Control userControl = LoadControl("../AleSettings1.ascx");      
    plchldSettingsControl.Controls.Add(userControl); 
}
</code></pre>

<p>If I press F5 (IE) after user control was rendered, I get IE's warning window that IE needs to resend the information....<br>
How can I prevent it and why does it happen?</p>

<p><strong>UPDATE:</strong></p>

<p>Maybe there is another approach? 
 I want to load specific control (with it's markup)  when user selects it from the dropdownlist.<br>
if a postback is made the control shouldn't disappear(only if another control was selected from the dropdownlist) </p>

<p>Everything is inside update panel!</p>
