public int GetAccountIndex(long accountId)
        {
            int index = -1;

            AccountInformations.ForEach(i => {
                if (i.AccountID == accountId)
                {
                    index = AccountInformations.IndexOf(i);
                }
            });

            return(index);
        }
 public int GetAccountIndex(CTwitterAccountInformation accountInformation)
 => AccountInformations.IndexOf(accountInformation);