The same applies to static Hyperlinks and to programmatically created HyperLinks:

HyperLink myCoolLink = new HyperLink();
myCoolLink.NavigateUrl = "SomePage.aspx";
myCoolLink.CssClass = "MyClass";
myCoolLink.Text = "Some Text";

This ends up in the browser as:

<a href="SomePage.aspx" class="MyClass">Some Text</a>

Not sure whether you typed over my message, or something else went wrong, but you need a dot in front of MyClass.

[WRONG]
MyClass
{
  text-decoration: none;
}

MyClass:hover
{
  text-decoration: underline;
}

[RIGHT]
.MyClass
{
  text-decoration: none;
}

.MyClass:hover
{
  text-decoration: underline;
}

Hope this helps,

Imar
---------------------------------------
Imar Spaanjaars
Everyone is unique, except for me.
Author of ASP.NET 2.0 Instant Results and Beginning Dreamweaver MX / MX 2004