ZeroAlloc.ValueObjects 1.1.4

.NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package ZeroAlloc.ValueObjects --version 1.1.4
                    


                    

                
NuGet\Install-Package ZeroAlloc.ValueObjects -Version 1.1.4
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.ValueObjects" Version="1.1.4" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="ZeroAlloc.ValueObjects" Version="1.1.4" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="ZeroAlloc.ValueObjects" />
                    


                            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.ValueObjects --version 1.1.4
                    


                    

                
#r "nuget: ZeroAlloc.ValueObjects, 1.1.4"
#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.ValueObjects@1.1.4
#: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.ValueObjects&version=1.1.4
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=ZeroAlloc.ValueObjects&version=1.1.4
                    


                            Install as a Cake Tool

ZeroAlloc.ValueObjects

NuGet Build License: MIT

Zero-allocation source-generated ValueObject equality for your existing domain types.

Same performance as record — without forcing the record keyword on your domain model. Add [ValueObject] to any partial class or partial struct and the generator emits Equals, GetHashCode, ==, !=, and ToString with no heap allocations.

Install

dotnet add package ZeroAlloc.ValueObjects

Quick start

// Annotate any existing partial class — no keyword changes, no base class
[ValueObject]
public partial class Money
{
    public decimal Amount { get; }
    public string Currency { get; }
    public Money(decimal amount, string currency) => (Amount, Currency) = (amount, currency);
}

// Use standard equality — zero allocations
var a = new Money(10m, "USD");
var b = new Money(10m, "USD");

bool equal = a == b;            // true
bool same  = a.Equals(b);       // true  — IEquatable<Money> fast path
int  hash  = a.GetHashCode();   // same as b.GetHashCode() — safe as dict key
string s   = a.ToString();      // "Money { Amount = 10, Currency = USD }"

Performance

ZeroAlloc.ValueObjects matches record and record struct performance exactly. The only allocating variant is CSharpFunctionalExtensions.ValueObject.

Method Mean Allocated
CFE_Equals 45.2 ns 96 B
Record_Equals 3.1 ns 0 B
RecordStruct_Equals 2.8 ns 0 B
ZeroAlloc_Equals 3.1 ns 0 B
ZeroAllocStruct_Equals 2.8 ns 0 B
CFE_GetHashCode 38.7 ns 88 B
Record_GetHashCode 2.4 ns 0 B
RecordStruct_GetHashCode 2.2 ns 0 B
ZeroAlloc_GetHashCode 2.4 ns 0 B
ZeroAllocStruct_GetHashCode 2.2 ns 0 B

Full methodology and more scenarios: docs/performance.md

Features

  • Zero allocations — no iterator state machine, no boxing
  • Works on existing partial class and partial struct — no refactoring required
  • Can inherit from non-record base classes
  • Fine-grained member control with [EqualityMember] (opt-in) and [IgnoreEqualityMember] (opt-out)
  • No extra generated members — no with, no Deconstruct, no EqualityContract
  • Null-safe comparison for nullable reference type properties
  • HashCode.Combine for ≤8 properties, incremental HashCode.Add for 9+

Why not just use record?

record ZeroAlloc.ValueObjects
Zero allocation ✓ ✓
Works on existing class/struct ✗ — forces record keyword ✓
Can inherit from non-record base ✗ ✓
Fine-grained member control ✗ [EqualityMember] / [IgnoreEqualityMember]
No extra generated members ✗ — adds EqualityContract, with, deconstruct ✓
Struct support record struct partial struct

Documentation

Page Description
Why this library? The problem with CFE, why not just use record
Installation NuGet install, .NET version requirements
Getting Started Step-by-step quickstart with core concepts
Attribute Reference [ValueObject], [EqualityMember], [IgnoreEqualityMember]
Member Selection How properties are chosen for equality
Generated Output Exact code the generator emits
Struct vs. Class When to use each, ForceClass
Nullable Properties Null-safe comparison generation
Usage Patterns Dictionary keys, HashSets, LINQ, EF Core, pattern matching
Migration Guide From CFE ValueObject, from manual equality
Performance Benchmark results and how to run them
Design Decisions Trade-offs, intentional omissions
Troubleshooting Common errors and fixes
Testing Writing unit tests for value object equality
Examples
E-Commerce ProductId, Money, ShippingAddress, Discount
Finance Iban, CurrencyPair, AccountNumber
HR / Identity EmailAddress, EmployeeId, FullName
Geospatial Coordinates, GeoRegion
Scheduling DateRange, TimeSlot

License

MIT

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  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 was computed.  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. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • .NETStandard 2.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last Updated
1.1.4 75 3/17/2026
1.1.3 73 3/16/2026
1.1.2 77 3/16/2026
1.1.1 76 3/16/2026