MediatR by: Jimmy Bogard

Simple, unambitious mediator implementation in .NET

MediatR.Contracts by: Jimmy Bogard

Contracts package for requests, responses, and notifications

MediatR.Extensions.Microsoft.DependencyInjection by: Jimmy Bogard

MediatR extensions for ASP.NET Core

Medo.Uuid7 by: Josip Medved

A library that enables fast generation of version 7 (time-ordered) UUIDs, designed for efficient utilization in databases and resource indexing. It provides conversions to and from GUIDs, multiple string representations, and wide compatibility with .NET 7 and higher, including .NET 4.6.1 and higher (.NET Standard 2.0). Additionally, it supports version 4 (fully random) UUIDs.

MemoryCache.Testing.Moq by: rgvlee

A mocking library that creates Microsoft.Extensions.Caching.Memory IMemoryCache system mocks using Moq.

MemoryPack.Generator by: Cysharp

Code generator for MemoryPack.

MessageBox.Avalonia by: Lary

Messagebox for AvaloniaUI

MessagePack by: neuecc

Extremely fast MessagePack (MsgPack) serializer for C#: source-generated formatters, Native AOT and trimming support, zero-copy buffers on .NET 9+, and wire compatibility with MessagePack for C# v3. Supports .NET Framework (netstandard2.0), .NET 9+ and Unity.

MessagePack.Annotations by: neuecc

Migration shim for MessagePack v3 code: the attributes now live in the MessagePack package and this package type-forwards to it. Reference MessagePack directly in new projects.

MessagePackAnalyzer by: neuecc, aarnott

Analyzers and source generator for MessagePack for C#. Verify rules for [MessagePackObject] and code fix for [Key]. A roslyn source generator for AOT or faster startup of applications that use the MessagePack nuget package.

MetadataReferenceService.Abstractions by: Stef Heyenrath

This package defines the IMetadataReferenceService interface.

MetadataReferenceService.Default by: Stef Heyenrath

Use this package to generate a MetadataReference based on an Assembly location or Assembly image.

Meziantou.Analyzer by: meziantou

A powerful C# Roslyn analyzer that uses static analysis to detect bugs, surface security issues, and enforce best practices—helping developers and AI write more reliable code.

MicroCom.CodeGenerator.MSBuild by: MicroCom.CodeGenerator.MSBuild

IDL-based COM interop codegen. Consumes MIDL-like IDL file, generates efficient cross-platform C# interop and C++ header files.

MicroCom.Runtime by: MicroCom.Runtime

IDL-based COM interop codegen. Consumes MIDL-like IDL file, generates efficient cross-platform C# interop and C++ header files.

Microsoft-WindowsAPICodePack-Core by: rpastric, contre, dahall

The Core code for the WindowsAPICodePack. This is an updated version containing all available bug fixes for this code as of 2020-01-04.

Microsoft-WindowsAPICodePack-Shell by: rpastric, contre, dahall

The Shell code for the WindowsAPICodePack. This is an updated version containing all available bug fixes for this code as of 2020-01-04.

Microsoft.AppCenter by: Microsoft

This package contains the basic functionalities that all App Center services use to communicate with the backend.

Microsoft.AppCenter.Analytics by: Microsoft

This package contains functionalities to collect session, device properties, events etc… for your application.

Microsoft.AppCenter.Crashes by: Microsoft

This package contains functionalities to collect crash reports for your application.