.NET is a free and open-source, managed computer software framework. It is a cross-platform successor to .NET Framework and released under the MIT License.

Adding FreeBSD Support to .NET is in progress with upstream work taking place mostly in the following issues:

• dotnet/source-build: GitHub Issue #1139: Building the .NET Core SDK on FreeBSD
• dotnet/runtime: GitHub Issue #14537: Support for FreeBSD

Concurrently, a number of contributors are working in non-upstream repositories to resolve issues and produce FreeBSD .NET binaries (Native and under Linux Emulation) until upstream is able to do so. See building

Notably, building .NET requires an existing and working dotnet cli SDK to bootstrap the build, as mentioned in the Workflow Guide: FreeBSD Requirements documentation/

Producing this binary natively for FreeBSD is the aim of upstream issue #1139 mentioned above.

Until native boostrap is available officially from upstream, FreeBSD .NET builds can be produced using either:

1. An existing freebsd dotnet cli binary.
2. A dotnet cli binary built on FreeBSD under Linux Emulation.

1. Reliably produce FreeBSD .NET binaries on an ongoing basis, and fix blocking issues and report/resolve upstream. Status:In-Progress
2. Assist upstream getting native FreeBSD .NET built, tested (CI) and binary packages produced on an on-going and official basis. Status: In-Progress
3. Create FreeBSD Ports from source (natively) for all .NET components and produce official packages for supported architectures. Status: Not Started

• Upstream .NET Workflow Guide
• Workflow Guide: FreeBSD Requirements

This section documents third party, maintained efforts to progress .NET FreeBSD support.

• GitHub: Thefrank - Cross-build under Linux Emulation
  • GitHub: Thefrank/dotnet-freebsd-crossbuild: Instructions for building dotNET for FreeBSD
  • Repository containing .NET FreeBSD binaries

• GitHub: sec - Native Build
  • GitHub: sec/dotnet-core-freebsd-source-build: Collection of script to build .NET Core under FreeBSD
  • Uses boostrap binaries from Thefrank
  • FreeBSD .NET Release Binaries (.NET 6 and 7)

The above GitHub (thefrank and sec) projects produce .NET FreeBSD Release Binaries:

• github.com: thefrank: FreeBSD .NET Release Binaries (.NET 5, 6 and 7)
• github.com: sec: FreeBSD .NET Release Binaries (.NET 6 and 7)

Developers and users are encouraged to test and provide feedback on these releases, report bugs, and provide improvements to the builds.

This section documents earlier work that may continue to prove useful as references.

• GitHub: jasonpugsley
  • Instructions to build .NET Core 3.1.x on FreeBSD

• windows.net: dotnet/Sdk/master/dotnet-sdk-latest-freebsd-x64.tar.gz

• Radarr Project – Ships FreeBSD .NET binaries
  • See FreeBSD Bugzilla Issue #259194: net-p2p/radarr: Switch to upstream .NET binary release
  • Radarr CI workflow to build FreeBSD binaries using Azure Pipelines.

.NET Framework 2.x

• lang/linux-dotnet-cli: Cross-platform .NET implementation
• lang/linux-dotnet-runtime: Cross-platform .NET implementation (Runtime)
• linux-dotnet-sdk: Cross-platform .NET implementation (Software Development Kit)

.NET Framework 1.1

• lang/linux-dotnet11-runtime: Cross-platform .NET implementation (Runtime)
• linux-dotnet11-sdk: Cross-platform .NET implementation (Software Development Kit)

.NET Framework 1.0

• lang/linux-dotnet10-runtime: Cross-platform .NET implementation (Runtime)