Ton Stegeman was asked if it is possible to set a hyperlink in the group description, just like SharePoint does out of the box. If you create a new site called “Team”, that site has a sitegroup called “Team Members”. The desciption for that site is: “Use this group to give people contribute permissions to the SharePoint site: Team”. The last part is a link to the site, as you can see in the screenshot below.

The question how to programmatically set this link in the description. The problem with this is that the Description property is a normal string property, that does not have the HTML value that is displayed above. The trick here is not to use the SPGroup object, but set the property directly on the listitem in a list called “User Information List. This is the list you are looking at when you are viewing People and Groups. Just read the comment in the screenshot above: “There are no items to show in this view of the "
User Information List" list.”.
All site groups (and users) are stored in this list, that is available in the rootweb of your site collection. I have extended the code of the previous example, so that it now also sets the description of the SPGroup to have a nice description with a hyperlink to the site it is used for.
Go over to his blog post titled
Using a hyperlink in the group description of a SharePoint group to see the full post and source code.