private void SendFaceToFriend() { Console.WriteLine(">Select to send a face:"); Console.WriteLine(face.DisplayMe()); var faceSelect = Console.ReadLine().ToLower(); if (!face.Contains(faceSelect)) { Console.WriteLine("Illegal face!"); return; } Console.WriteLine(">Who do you want to send txt to?"); var friendName = Console.ReadLine(); if (p2p.CheckFriend(friendName) == null) { Console.WriteLine("Friend not exists,or not online!"); return; } p2p.SendTxtToFriend(friendName, faceSelect); }