Top 20 NuGet helper Packages

XmlToObjectConverter converts an XmlDocument or string to an object graph. The way to map XML to classes is easier than the classic ways in .NET. XmlHelper allows you to access XML in a null-safe and multiplicity-safe way. It uses XmlDocument as the underlying .NET API.
EnumUtils provides some essential enum helper methods.
A high performance micro sql helper supporting SQL Server、MySQL、PostgreSQL
Persistence test helpers for CoreDdd library
A number of simple methods to test database objects and execute sql. Currently supports Microsoft SQL Server databases.
A collection of useful helper extension methods
The Relativity API Helpers include interfaces that you can program against when developing agents, custom pages, and event handlers. They provide the ability to write common code for sharing across these extensibility points, simplifying your development processes and facilitating code reusability.
Test helpers for CoreDdd library
Helpers for CoreDdd library
MCART for Windows Presentation Framework
MCART .Net Standard Edition
A set of generic helper methods and classes for .NET Framework
Accessory to Persian calendar, string extensions, encryption, ip, log and rest api for .Net. You can easily use it.
Infrastructure for programming on C#. Target platforms: Net40, SL5
A .NET Standard 2.0 library of helpers and extensions for working with SOAP payloads in the Nancy web framework.
Microsoft Dynamics CRM 2016 / Dynamics 365 Entity Helper. This library includes almost full MS CRM 2016 / Dynamics 365 SDK methods and UI methods.
Helper for UWP apps and libs
Json.NET web client
MCART Lite Edition
Personal utility class library Combinatorics,CSV,DataTable,DateTime, Dictionary,Directory,Download,Enum,Linq,Reflection,String,TupleList related methods/types