Programatically deleting an Audience from Audience Collection

Code:

using (SPSite spSite = new SPSite(@"http://localhost"))
{
     ServerContext siteContext = ServerContext.GetContext(spSite);
     AudienceManager amManager = new AudienceManager(siteContext);

     string strName = "Technology Department";

     if (amManager.Audiences.AudienceExist(strName))
     {
          amManager.Audiences.Remove(strName);
      }
}