CSRedisCore by: CSRedisCore

CSRedis 是 redis.io 官方推荐库，支持 redis-trib集群、哨兵、私有分区与连接池管理技术，简易 RedisHelper 静态类。

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.

Deedle by: BlueMountain Capital

Deedle implements an efficient and robust frame and series data structures for manipulating with structured data. It supports handling of missing values, aggregations, grouping, joining, statistical functions and more. For frames and series with ordered indices (such as time series), automatic alignment is also available.

DH.NCode by: 湖北登灏科技有限公司

高性能 .NET 数据中间件（超级ORM），聚焦添删改查与海量数据，内置多级缓存、自动迁移、分表分库、强类型查询与跨库迁移。

DH.NCore by: 湖北登灏科技有限公司

Core library of NewLife framework. Provides high-performance infrastructure for building scalable applications: logging (file/network), configuration (XML/JSON/HTTP), cache (memory/distributed), network (TCP/UDP/HTTP/WebSocket), serialization (binary/XML/JSON), APM tracing, IoC container, actor model, timer scheduler, plugin framework, and more. Supports .NET Framework 4.5 to .NET 10. 核心组件库，为构建可扩展应用程序提供高性能基础设施。提供日志（文件/网络）、配置（XML/JSON/HTTP）、缓存（内存/分布式）、网络（TCP/UDP/HTTP/WebSocket）、序列化（Binary/XML/JSON）、APM性能追踪、对象容器、并行模型、定时调度、插件框架等。支持.NET Framework 4.5至.NET 10全版本。

diskann-garnet by: Microsoft

DiskANN FFI and Data Provider for Garnet

DynamicData by: Roland Pheasant

Bring the power of Rx to collections using Dynamic Data. Dynamic Data is a comprehensive caching and data manipulation solution which introduces domain centric observable collections. Linq extensions enable dynamic filtering, sorting, grouping, transforms, binding, pagination, data virtualisation, expiration, disposal management plus more.

DynamicExpresso.Core by: Davide Icardi

Dynamic Expresso is an interpreter for simple C# statements. Dynamic Expresso embeds its own parsing logic, really interprets C# statements by converting it to .NET lambda expressions or delegates. Using Dynamic Expresso developers can create scriptable applications, execute .NET code without compilation or create dynamic linq statements. Statements are written using a subset of C# language specifications. Global variables or parameters can be injected and used inside expressions. It doesn't generate assembly but it creates an expression tree on the fly.

Elasticsearch.Net by: Elasticsearch Inc. and contributors

Exposes all the api endpoints but leaves you in control of building the request and response bodies. Comes with built in cluster failover/connection pooling support.

EMGU.CV by: Emgu Corporation

Emgu CV is a cross platform .Net wrapper to the OpenCV image processing library. Allowing OpenCV functions to be called from .NET compatible languages such as C#, VB, VC++, IronPython etc.

EntityFramework by: Microsoft

Entity Framework 6 (EF6) is a tried and tested object-relational mapper for .NET with many years of feature development and stabilization.

Enums.NET by: Tyler Brinkley

Enums.NET is a high-performance type-safe .NET enum utility library

EPPlus.Core by: Vahid Nasiri

EPPlus.Core is an unofficial port of the EPPlus library to .NET Core.

ExcelNumberFormat by: ExcelNumberFormat developers

.NET library to parse ECMA-376 number format strings and format values like Excel and other spreadsheet softwares.

Exceptionless by: Exceptionless

Exceptionless is a cloud based error reporting service that sends your exceptions to https://exceptionless.com and provides aggregated views and analytics.

Exceptionless.Portable by: Exceptionless

Exceptionless client for portable applications. Exceptionless is a cloud based error reporting service that sends your exceptions to http://exceptionless.io and provides aggregated views and analytics.

ExCSS by: Tyler Brinks

ExCSS reads and parses stylesheets using CSS 3 and CSS 2 selector specifications, and is easily queryable from LINQ using its simple and readable object model.

ExtendedNumerics.BigDecimal by: https://github.com/AdamWhiteHat

Arbitrary precision decimal class

FeatureToggle by: Jason Roberts - dontcodetired.com

Simple, reliable feature toggles in .NET