Preventing ASP.NET from encoding special characters

[Edward]

Hello,

I'm trying to add an attribute to a cell:

td.Attributes.Add("ondblCilck",
"OpenWindow('location.aspx?id=4&purpose=new')" );

The trouble is, asp.net encodes this and sends the response back to the
browser as:

<td ... ondblClick="OpenWindow('location.aspx?id=4&purpose =new');"...

...</td>

If you notice it changed the "&" to "&amp;". This encoding process makes
sense under normal conditions, but how do I prevent that from happening in
this particular case? Any help would be appreciated.

Thanks,