Do you know C#, then come in, I need criticism on my code.

[Coding Enthusiast]

TL;DR
Code: https://github.com/Coding-Enthusiast/Watch-Only-Bitcoin-Wallet
Ann: https://bitcointalk.org/index.php?topic=1616888.0
I have made a silly little code with C♯ and i am looking for any kind of feedback/review/criticism/...
See the original review request topic on Reddit here: https://www.reddit.com/r/csharp/comments/56m46e/beginnerreviewcriticize_requestgithub_watch_only/

About the code:
A simple GUI to keep track of bitcoin addresses and their balances, using API, HttpClient, saving file using Xml.Serialization, also I've put lots of effort into the WPF ListView and sorting it.
204 lines of code.

About me:
I am a beginner in programming, also in using GitHub and This is my first serious code that I have published.
I have tried to do everything as it must be done using the learning resources available. But I am sure there are lots of things I still need to learn.
Please take a look. I am open to all kinds of feedback, suggestion, criticism,... both about the code in C♯ , or about the way i have pushed commits to GitHub.


This topic is posted in Off-Topic since I couldn't really think of any other place to ask for reviews. Services board is not appropriate since I am not offering anything in return apart from my gratitude 

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[chris_nor]

Judging from the volume on this off topic forum, I don't think you're going to get much help. The volume is low, and then of those posting chances are slim that they will be able to help you.