/// <summary>
 /// Get the Transactions after the specified block
 /// </summary>
 /// <returns></returns>
 private List <TransactionSinceBlock> GetTransactionsSinceBlock()
 {
     if (string.IsNullOrEmpty(_blockHash))
     {
         _blockHash = _litecoinService.GetBestBlockHash();
         return(null);
     }
     else
     {
         // Get the list of blocks from the point we last time checked for blocks, by providing the last blockHash
         // recorded last time
         List <TransactionSinceBlock> transactionSinceBlocks = _litecoinService.ListSinceBlock(_blockHash, 1).Transactions;
         _blockHash = _litecoinService.GetBestBlockHash();
         return(transactionSinceBlocks);
     }
 }