CsvHelper by: Josh Close

A library for reading and writing CSV files. Extremely fast, flexible, and easy to use. Supports reading and writing of custom class objects.

Dapper by: Sam Saffron Marc Gravell Nick Craver

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

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.

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.

Dates.Recurring by: Gavyn Riebau

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

DevExpress.Data by: Developer Express Inc.

Target Platform/Framework: Cross-Platform DevExpress Product Libraries Used: Core Libraries (https://docs.devexpress.com/CoreLibraries) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, DevExtreme Complete, Reporting, Office File API

DevExpress.DataAccess by: Developer Express Inc.

Target Platform/Framework: Cross-Platform DevExpress Product Libraries Used: Core Libraries (https://docs.devexpress.com/CoreLibraries) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting, Office File API

DevExpress.Reporting.Core by: Developer Express Inc.

Target Platform/Framework: Cross-Platform DevExpress Product Libraries Used: .NET Reporting (https://www.devexpress.com/subscriptions/reporting) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Utils by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Web by: Developer Express Inc.

Target Platform/Framework: Web DevExpress Product Libraries Used: ASP.NET WebForms UI components (https://www.devexpress.com/webforms) Available in the following DevExpress Subscription(s): Universal, DXperience, ASP.NET & Blazor (includes DevExtreme), Reporting

DevExpress.Win by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, Reporting

DevExpress.Win.Grid by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Win.Navigation by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Win.PivotGrid by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, Reporting

DevExpress.Win.Printing by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Win.TreeList by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, Reporting

DevExpress.Win.VerticalGrid by: Developer Express Inc.

Target Platform/Framework: Desktop DevExpress Product Libraries Used: WinForms UI components (https://www.devexpress.com/winforms) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, Reporting

DevExpress.Xpo by: Developer Express Inc.

Target Platform/Framework: Desktop, Web, Mobile DevExpress Product Libraries Used: XPO (.NET ORM Library) (https://www.devexpress.com/xpo) Available in the following DevExpress Subscription(s): Universal, DXperience, WinForms, ASP.NET & Blazor (includes DevExtreme), WPF, DevExtreme Complete, Reporting

DevExtreme.AspNet.Data by: Developer Express Inc.

DevExtreme data layer extension for ASP.NET

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.