update using

Author: ajara87

src/Neo.CLI/CLI/MainService.Wallet.cs

@@ -12,7 +12,7 @@
 using Akka.Actor;
 using Neo.ConsoleService;
 using Neo.Cryptography;
-using Neo.Extensions.IO;
+using Neo.Extensions;
 using Neo.Json;
 using Neo.Network.P2P;
 using Neo.Network.P2P.Payloads;