Top 20 NuGet validation Packages

Build validators for forms (IFormCollection) and queries (IQueryCollection) using a simple fluent interface

Error messages and error formatting for YouShallNotPass.

Middleware that validates passwords against a blacklist.

An out of the box integration for fluent validation framework and INotifyDataErrorInfo interface. just decorate your target class with [NotifyDataErrorInfo(typeof(<FluentValidatorType>))] . Recommended to use with Syncfusion Data Form.

Falsify is a body of methods designed to efficiently reject bad data. Falsify.Core contains the core interface for all falsifiers (Falsify.IFalsify).

Wiesend's Dynamic Link Library is a collection of reusable code that I've written, or found throughout my programming career. It includes code to help with tasks including encryption, file management, compression, serialization, email, image manipulation, SQL, various file formats (CSV, iCal, etc.),...

FluentObjectValidator is a small and simple validation library that provides fluent interface for rule configuration.

A collection of validation rules for Visual Studio Web Tests.

Check the UK sort code/account number using algorithms and weightings published by VocaLink

Useful extension methods to make basic variable validation easier, more readable and maintainable.

Implementation of option type holding a value or representing a none.

A command line tool that validates files against a JSON schema.

Juhta.Net.Validation defines common data validation interfaces and provides a set of validator classes. This library is a part of Juhta.NET.

FluentValidation extensions for Stronk.

Simple, unambitious, fluent, chain of responsability based validation library.

Library that enables the user to validate the most frequently used .Net framework attributes.

Data Validation Helper Library

Add data attributes to setting class methods to validate input, set default values etc

Blazor component for validating your form with DataAnnotations attributes. Made from this blog post https://remibou.github.io/Client-side-validation-with-Blazor-and-Data-Annotations/

SheetToObjects is a library which aims to provide developers with an easy solution to map sheets (Google Sheets, Microsoft Excel, csv) to a model/POCO.