ZeroAlloc.Validation.Generator 1.2.0

There is a newer version of this package available.
See the version list below for details.

dotnet add package ZeroAlloc.Validation.Generator --version 1.2.0

NuGet\Install-Package ZeroAlloc.Validation.Generator -Version 1.2.0

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="ZeroAlloc.Validation.Generator" Version="1.2.0">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="ZeroAlloc.Validation.Generator" Version="1.2.0" />
                    

                            Directory.Packages.props

<PackageReference Include="ZeroAlloc.Validation.Generator">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
                    

                            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 ZeroAlloc.Validation.Generator --version 1.2.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: ZeroAlloc.Validation.Generator, 1.2.0"

#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 ZeroAlloc.Validation.Generator@1.2.0

#: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=ZeroAlloc.Validation.Generator&version=1.2.0
                    

                            Install as a Cake Addin

#tool nuget:?package=ZeroAlloc.Validation.Generator&version=1.2.0
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

ZeroAlloc.Validation

Source-generated, attribute-based validation for .NET that allocates nothing on the valid path. The source generator emits a strongly-typed validator class at build time — no reflection at runtime. When all rules pass, the entire validation cycle produces zero heap allocations.

Install

dotnet add package ZeroAlloc.Validation

30-Second Example

using ZeroAlloc.Validation;

[Validate]
public class CreateOrderRequest
{
    [NotEmpty][MaxLength(50)] public string  Reference { get; set; } = "";
    [GreaterThan(0)]          public decimal Amount    { get; set; }
    [NotEmpty][EmailAddress]  public string  Email     { get; set; } = "";
}

// The source generator emits CreateOrderRequestValidator at build time
var request   = new CreateOrderRequest
{
    Reference = "ORD-2026-001",
    Amount    = 99.99m,
    Email     = "customer@example.com"
};
var validator = new CreateOrderRequestValidator();
var result    = validator.Validate(request);

if (!result.IsValid)
    foreach (ref readonly var f in result.Failures)
        Console.WriteLine($"{f.PropertyName}: {f.ErrorMessage}");

Performance

Scenario	ZeroAlloc.Validation	FluentValidation	Speedup
Flat model	6.7 ns	327 ns	~49×
Nested model	10.1 ns	619 ns	~61×
Collection (3×)	14.3 ns	2,043 ns	~143×

See Performance for full benchmark results.

Packages

Package	Purpose
`ZeroAlloc.Validation`	Core library — attributes, source generator, `ValidationResult`
`ZeroAlloc.Validation.AspNetCore`	Auto-validates request models; returns HTTP 422 on failure
`ZeroAlloc.Validation.Inject`	Emits `AddZeroAllocValidators()` — bulk DI registration in one call
`ZeroAlloc.Validation.Options`	Emits `ValidateWithZeroAlloc()` — plugs validators into `Microsoft.Extensions.Options`
`ZeroAlloc.Validation.Testing`	Fluent assertions for unit-testing validators

Features

Zero heap allocation on the valid path
25+ built-in validation attributes
Nested object and collection validation
ASP.NET Core auto-validation (HTTP 422 on failure)
Zero-friction DI registration (AddZeroAllocValidators())
Source-generated Microsoft.Extensions.Options integration (ValidateWithZeroAlloc())
Per-rule severity (Error, Warning, Info)
Conditional rules (When / Unless / [SkipWhen])
Short-circuit with [StopOnFirstFailure]
Custom rules via [Must] predicates or [CustomValidation] methods
Testing helpers via ZeroAlloc.Validation.Testing

Documentation

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
1.3.0	298	5/13/2026
1.2.0	88	5/13/2026
1.1.2	83	5/13/2026