There is a problem in width property for DropDownList 
<p>I have dropdownlist and textbox and both of them have width property set to 100px,
why the dropdownlist is smaller than textbox.</p>

<pre><code>&lt;asp:DropDownList runat="server" Width="100" &gt;&lt;/asp:DropDownList&gt; 
&lt;asp:TextBox runat="server" Width="100" &gt;&lt;/asp:TextBox&gt; 
</code></pre>
