JasperFx.RuntimeCompiler 5.0.0

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package JasperFx.RuntimeCompiler --version 5.0.0
                    


                    

                
NuGet\Install-Package JasperFx.RuntimeCompiler -Version 5.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="JasperFx.RuntimeCompiler" Version="5.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="JasperFx.RuntimeCompiler" Version="5.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="JasperFx.RuntimeCompiler" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add JasperFx.RuntimeCompiler --version 5.0.0
                    


                    

                
#r "nuget: JasperFx.RuntimeCompiler, 5.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package JasperFx.RuntimeCompiler@5.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=JasperFx.RuntimeCompiler&version=5.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=JasperFx.RuntimeCompiler&version=5.0.0
                    


                            Install as a Cake Tool

JasperFx.RuntimeCompiler

Roslyn-based runtime code-generation backend for the Critter Stack. Compiles in-memory C# at runtime and loads the resulting assembly into the host process — used by Marten, Wolverine, and Polecat for dynamic code paths (LINQ compilation, message handlers, document storage).

Installing this package is opt-in. Apps that pre-generate all code (dotnet run -- codegen write) and run in TypeLoadMode.Static can omit JasperFx.RuntimeCompiler entirely and ship without Roslyn in the production bundle — the foundation for PublishAot=true deployments.

Usage

Register the runtime compiler service in DI to opt in:

services.AddSingleton<IAssemblyGenerator, AssemblyGenerator>();

When GenerationRules.TypeLoadMode is Dynamic or Auto, codegen will route through AssemblyGenerator to compile in-memory.

Documentation

Full docs at https://jasperfx.net.

Repo: github.com/JasperFx/jasperfx.

Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (3)

Showing the top 3 NuGet packages that depend on JasperFx.RuntimeCompiler:

Package Downloads
JasperFx.CodeGeneration.Commands

Command line utilities for managing Lamar dynamically generated code
Portlogics.WolverineFx

Build Robust Event Driven Architectures with Simpler Code
WolverineFx.RuntimeCompilation

Opt-in runtime Roslyn compilation support for Wolverine. Add this package and call opts.UseRuntimeCompilation() to enable on-the-fly handler/middleware code generation in development mode. Production deployments that pre-generate code (TypeLoadMode.Static) do not need this package and ship without Roslyn — smaller binaries, faster cold starts, and AOT-readiness. See issue #1577.

GitHub repositories (2)

Showing the top 2 popular GitHub repositories that depend on JasperFx.RuntimeCompiler:

Repository Stars
JasperFx/marten
.NET Transactional Document DB and Event Store on PostgreSQL
JasperFx/wolverine
Supercharged .NET server side development!
Version Downloads Last Updated
5.0.0 3,096 5/21/2026
5.0.0-rc.3 171 5/21/2026
5.0.0-rc.2 1,003 5/20/2026
5.0.0-rc.1 39 5/20/2026
5.0.0-alpha.8 104 5/19/2026
5.0.0-alpha.5 747 5/19/2026
5.0.0-alpha.4 35 5/19/2026
5.0.0-alpha.3 42 5/19/2026
5.0.0-alpha.2 42 5/19/2026
5.0.0-alpha.1 2,706 5/14/2026
4.5.0 250,094 4/28/2026
4.4.0 1,157,780 2/14/2026
4.3.2 201,484 1/29/2026
4.3.1 402,420 12/19/2025
4.3.0 263,520 12/11/2025
4.2.1 137,669 12/5/2025
4.2.0 412,391 11/11/2025
4.1.0 128,503 10/20/2025
2.0.0-alpha.2 5,813 5/12/2026
2.0.0-alpha.1 1,676 5/10/2026
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