DnsClient by: MichaCo

DnsClient.NET is a simple yet very powerful and high performance open source library for the .NET Framework to do DNS lookups

DocumentFormat.OpenXml by: Microsoft

The Open XML SDK provides tools for working with Office Word, Excel, and PowerPoint documents. It supports scenarios such as: - High-performance generation of word-processing documents, spreadsheets, and presentations. - Populating content in Word files from an XML data source. - Splitting up (shredding) a Word or PowerPoint file into multiple files, and combining multiple Word/PowerPoint files into a single file. - Extraction of data from Excel documents. - Searching and replacing content in Word/PowerPoint using regular expressions. - Updating cached data and embedded spreadsheets for charts in Word/PowerPoint. - Document modification, such as removing tracked revisions or removing unacceptable content from documents.

DevExtreme.AspNet.Data by: Developer Express Inc.

DevExtreme data layer extension for ASP.NET

Dapper by: Sam Saffron Marc Gravell Nick Craver

A high performance Micro-ORM supporting SQL Server, MySQL, Sqlite, SqlCE, Firebird etc..

DapperExtensions by: Thad Smith Page Brooks

A small library that complements Dapper by adding basic CRUD operations (Get, Insert, Update, Delete) for your POCOs. For more advanced querying scenarios, Dapper Extensions provides a predicate system.

Dapper.Contrib by: Sam Saffron Johan Danforth

The official collection of get, insert, update and delete helpers for Dapper.net. Also handles lists of entities and optional "dirty" tracking of interface-based entities.

Dates.Recurring by: Gavyn Riebau

Easily calculate the next recurrence for recurring dates using a fluent syntax

DotNetAnalyzers.PublicApiAnalyzer by: Sam Harwell et. al.

An analyzer for packages with public APIs.

DotNetAnalyzers.PublicApiAnalyzer.Unstable by: Sam Harwell et. al.

An analyzer for packages with public APIs.

DotLiquid by: Tim Jones Alessandro Petrelli

DotLiquid is a templating system ported to the .NET framework from Ruby’s Liquid Markup.

Docker.DotNet.X509 by: Docker.DotNet.X509

Docker.DotNet.X509 is a library that allows you to use certificate authentication with a remote Docker engine programmatically in your .NET applications.

Docker.DotNet by: Docker.DotNet

Docker.DotNet is a library that allows you to interact with the Docker Remote API programmatically with fully asynchronous, non-blocking and object-oriented code in your .NET applications.

DevExpress.Data by: Developer Express Inc.

This package provides basic functionality for data-aware DevExpress controls.

DinkToPdf by: Rok Dvojmoc

.NET Core P/Invoke wrapper for wkhtmltopdf library that uses Webkit engine to convert HTML pages to PDF.

DeviceDetector.NET by: totpero

The Universal Device Detection library for .NET that parses User Agents and detects devices (desktop, tablet, mobile, tv, cars, console, etc.), clients (browsers, feed readers, media players, PIMs, ...), operating systems, brands and models. This is a port of the popular PHP device-detector library to C#. For the most part you can just follow the documentation for device-detector with no issue.

DotNetZip by: Dino Chiesa

DotNetZip is an easy-to-use, FAST, FREE class library and toolset for manipulating zip files or folders.

DinkToPdfCopy by: Michael Faisst

.NET Core P/Invoke wrapper for wkhtmltopdf library that uses Webkit engine to convert HTML pages to PDF.

DNTCaptcha.Core by: Vahid Nasiri

DNTCaptcha.Core is a captcha generator and validator for ASP.NET Core applications.

DinkToPdfAll by: Martín José Acosta Santos

A wrapper of DinkToPdfAll that just include x64 and x86 version of the wkhtmltox library.

DotNetCore.NPOI by: NCC Savorboard

A .NET library for reading and writing Microsoft Office binary and OOXML file formats.