protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
// Only display the button if a link URL and link text have been specified
ContactBlockLink.Visible = !string.IsNullOrWhiteSpace(CurrentBlock.LinkText) &&
CurrentBlock.LinkUrl != null &&
!CurrentBlock.LinkUrl.IsEmpty();
// In edit mode an editor can click the link button below the contact details to edit its text
Link.ApplyEditAttributes <ContactBlock>(c => c.LinkText);
Link.DataBind();
}