Top 20 NuGet bitcoin Packages

Client for Coinbase Pro websocket API
The C# Block.io SDK
This package contains platform-specific native code builds of secp256k1. Included: osx-x64/libsecp256k1.dylib, linux-x64/libsecp256k1.so, win-x64/secp256k1.dll, win-x86/secp256k1.dll
Cross platform, base C# library for all Hardwarewallets. Provides simple interfaces that sit underneath all hardwarewallet libraries, and utilitiy classes that sit over the top all libraries
Base58Check is a C# implementation of Base58 Checked Encoding
.NET wrapper for Blockcypher
The SDK provides a default implementation of the Bitnet API client using RestSharp.
Primedice API for applications written in the .NET Framework
A portable API library for the Lisk blockchain. If you use this library in your project please feel free to give me a heads up so I can add it to the list of projects and don't forget to vote for delegate byronp.
A C# wrapper around the https://coinmarketcap.com API.
Block chain Indexer for Bitcoin Cash using Microsoft Azure as backend
The C# Bitcoin Library for Bitcoin Gold
Client library for Stratis server
Client for Bitfinex and Ethfinex websocket API version 2.0
Zapster XRP Payment Gateway is a FREE and convenient way to accept XRP payments from your website directly to your XRP Wallet. We provide Instant Payment Notification services for XRP Payments with no fees or transaction costs. This is an Asp.Net Client SDK for integration with Zapster API V1.
CryptoCompare Market Infomation Api for .NET