CSharpEssentials.Errors 3.0.3

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. .NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package CSharpEssentials.Errors --version 3.0.3
                    


                    

                
NuGet\Install-Package CSharpEssentials.Errors -Version 3.0.3
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="CSharpEssentials.Errors" Version="3.0.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="CSharpEssentials.Errors" Version="3.0.3" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="CSharpEssentials.Errors" />
                    


                            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 CSharpEssentials.Errors --version 3.0.3
                    


                    

                
#r "nuget: CSharpEssentials.Errors, 3.0.3"
#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 CSharpEssentials.Errors@3.0.3
#: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=CSharpEssentials.Errors&version=3.0.3
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=CSharpEssentials.Errors&version=3.0.3
                    


                            Install as a Cake Tool

CSharpEssentials.Errors

Structured, type-safe error handling for .NET. Errors are data, not exceptions.

Features

  • Error Struct — Value-type error with code, description, type, and metadata.
  • Standard Error Types — Failure, Validation, NotFound, Conflict, Unauthorized, Forbidden, Unexpected.
  • ErrorMetadata — Attach contextual data to errors fluently.
  • Exception Bridge — Convert exceptions to Error or throw DomainException / EnhancedValidationException.
  • HTTP Mapping — Built-in conversion between ErrorType and HTTP status codes.

Installation

dotnet add package CSharpEssentials.Errors

Usage

Creating Errors

using CSharpEssentials.Errors;

Error notFound = Error.NotFound("User.NotFound", "User was not found.");
Error validation = Error.Validation("Email.Invalid", "Email format is invalid.");
Error conflict = Error.Conflict("User.Duplicate", "User already exists.");
Error failure = Error.Failure("Payment.Failed", "Payment was rejected.");

Error Metadata

Error withMeta = Error.NotFound(
    "User.NotFound",
    "User was not found.",
    new ErrorMetadata()
        .AddMetadata("TraceId", Guid.NewGuid().ToString())
        .AddMetadata("RequestPath", "/api/users/123"));

Combining Errors

Error a = Error.Validation("Name.Empty", "Name is required.");
Error b = Error.Validation("Email.Invalid", "Email is invalid.");

Error[] combined = a + b;

Converting from Exceptions

try { /* ... */ }
catch (Exception ex)
{
    Error error = Error.Exception(ex);
}

Domain Exceptions

using CSharpEssentials.Exceptions;

Error error = Error.Validation("Order.Invalid", "Total must be greater than zero.");
throw new DomainException(error);

HTTP Status Mapping

int status = ErrorType.NotFound.ToHttpStatusCode();     // 404
ErrorType type = 401.ToErrorType();                      // Unauthorized
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 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.  net11.0 is compatible. 
.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.

NuGet packages (6)

Showing the top 5 NuGet packages that depend on CSharpEssentials.Errors:

Package Downloads
CSharpEssentials

A comprehensive C# library enhancing functional programming capabilities with type-safe monads (Maybe, Result), discriminated unions (Any), and robust error handling. Features include: domain-driven design support, enhanced Entity Framework integration, testable time management, JSON utilities, and LINQ extensions. Built for modern C# development with focus on maintainability, testability, and functional programming principles.
CSharpEssentials.AspNetCore

A comprehensive ASP.NET Core library that enhances functional programming capabilities in web applications. Features include API versioning, global exception handling with enhanced problem details, advanced Swagger/OpenAPI configuration, model validation, optimized JSON handling, and seamless integration with CSharpEssentials core functional patterns (Result, Maybe, Rule Engine). Perfect for building robust, maintainable, and type-safe web APIs following functional programming principles.
CSharpEssentials.Results

Result pattern implementation for functional error handling in C#. Provides Result<T> and Result types for railway-oriented programming, eliminating exceptions for expected failures. Foundation for functional programming patterns and robust error handling.
CSharpEssentials.Maybe

Maybe monad implementation with LINQ support for functional programming in C#. Provides type-safe null handling, eliminates null reference exceptions, and enables functional composition. Essential for functional programming patterns and safe value handling.
CSharpEssentials.Http

HttpClient extensions that bridge HTTP calls to the Result pattern. Provides GetFromJsonAsResultAsync, PostAsJsonAsResultAsync, status code mapping, and Polly resilience integration.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
3.0.5 30 5/7/2026
3.0.4 133 5/6/2026
3.0.3 182 5/5/2026
3.0.2 232 5/5/2026
3.0.1 315 5/3/2026
3.0.0 297 5/3/2026
2.1.0 376 11/26/2025
2.0.9 315 9/30/2025
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2.0.5 302 9/29/2025
2.0.4 326 9/28/2025
2.0.3 308 9/28/2025
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2.0.1 316 9/28/2025
2.0.0 313 9/28/2025