public GroupRegistration GetGroupRegistration(int invitationCode, RsaKeyParameters participantPublicKey)
        {
            var group = server.GetGroup(invitationCode);

            return(new GroupRegistration(group, new ContentBlinder(group.RsaPublicKey, group.Name), participantPublicKey));
        }
 public Group GetGroup(int invitationCode)
 {
     return(server.GetGroup(invitationCode));
 }