ErrorOr.Core 1.0.1

dotnet add package ErrorOr.Core --version 1.0.1
                    
NuGet\Install-Package ErrorOr.Core -Version 1.0.1
                    
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="ErrorOr.Core" Version="1.0.1" />
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="ErrorOr.Core" Version="1.0.1" />
                    
Directory.Packages.props
<PackageReference Include="ErrorOr.Core" />
                    
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 ErrorOr.Core --version 1.0.1
                    
#r "nuget: ErrorOr.Core, 1.0.1"
                    
#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 ErrorOr.Core@1.0.1
                    
#: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=ErrorOr.Core&version=1.0.1
                    
Install as a Cake Addin
#tool nuget:?package=ErrorOr.Core&version=1.0.1
                    
Install as a Cake Tool

ErrorOrX

Modern ErrorOr implementation for .NET 10 with fluent API and source generators.

Packages

Package Description
ErrorOr.Core Core ErrorOr discriminated union with fluent API
ErrorOr.Endpoints Source generator for ASP.NET Core Minimal API endpoints
ErrorOr.Endpoints.CodeFixes Roslyn code fixes for ErrorOr.Endpoints

Installation

dotnet add package ErrorOr.Core
dotnet add package ErrorOr.Endpoints

Quick Start

using ErrorOr.Core;

// Return success or error
ErrorOr<User> GetUser(int id)
{
    if (id <= 0)
        return Error.Validation("User.InvalidId", "User ID must be positive");

    return new User { Id = id, Name = "John" };
}

// Handle result fluently
var result = GetUser(1)
    .Then(user => UpdateUser(user))
    .Else(errors => HandleErrors(errors));

License

MIT

Product Compatible and additional computed target framework versions.
.NET 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.
  • net10.0

    • 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
1.0.1 34 1/10/2026
1.0.0 38 1/10/2026