passing # in hyperlink field in gridview

[arkgroup]

I am using VS 2005 and gridview hyperlink field. It point to the same
page.
Here is what I have :

<asp:HyperLinkField
DataNavigateUrlFields="RefrigeratorName,RefrigeratorType,RefrigeratorID,RefrigeratorTypeID"
DataNavigateUrlFormatString="MyUnit.aspx?Tab=2&amp;RefrigeratorName={0}&amp;RefrigeratorType={1}&amp;RefrigeratorID={2}&amp;RefrigeratorTypeID={3}"

Everything works fine, unless I have "#" or "&" characters in
RefrigeratorName field.
In case like this RefrigeratorName= "refrig # 3",
Request.QueryString["RefrigeratorName"].ToString() return only
"refrig" and all next Request.QueryString return null. I can see
right text when I move mouse on the link, but request.quesrystring
returns wrong. T try to change HtmlEncode on this filed, but it did no
seems tot help

Any help?

Thanks