Errgo 0.1.0

.NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. 
dotnet add package Errgo --version 0.1.0
                    


                    

                
NuGet\Install-Package Errgo -Version 0.1.0
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="Errgo" Version="0.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Errgo" Version="0.1.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Errgo" />
                    


                            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 Errgo --version 0.1.0
                    


                    

                
#r "nuget: Errgo, 0.1.0"
#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 Errgo@0.1.0
#: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=Errgo&version=0.1.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Errgo&version=0.1.0
                    


                            Install as a Cake Tool

Errgo

Go-style errors-as-values in C#. Instead of throwing exceptions, you return a tuple of (result, Error) and check the error explicitly at the call-site.

Install

dotnet add package Errgo

Quick start

using Errgo;

var (user, err) = GetUserById("1234");
if (err) return (null, err);
else return (user, Error.None);

Error is a struct, so it never allocates. Error.None signals success. default(Error) is still an error. If it's not Error.None, it's a failure.

Features

  • Value type - no heap allocations, equality compared by value
  • Sentinel errors - Error.Sentinel(...) for creating known errors to match against
  • Composition - Error.Join(...) combines multiple errors into a chain of inner errors
  • Error stack - Print the whole error stack of an error and it's accumulated inner errors, source file and file number included
  • Pattern matching - Is(Error) and As(Error, out Error) to branch on specific errors
  • Companion analyzer - Errgo.Analyzer enforces the errors-as-values style in your IDE

Requirements

  • .NET Standard 2.1

License

MIT — see the repository for the full source and documentation.

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 netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen 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 2.1

    • 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
0.1.0 61 9/16/2026
0.1.0-alpha 68 9/13/2026