BrutalHack.Bouncer 1.0.2

Install-Package BrutalHack.Bouncer -Version 1.0.2
dotnet add package BrutalHack.Bouncer --version 1.0.2
<PackageReference Include="BrutalHack.Bouncer" Version="1.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add BrutalHack.Bouncer --version 1.0.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: BrutalHack.Bouncer, 1.0.2"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install BrutalHack.Bouncer as a Cake Addin
#addin nuget:?package=BrutalHack.Bouncer&version=1.0.2

// Install BrutalHack.Bouncer as a Cake Tool
#tool nuget:?package=BrutalHack.Bouncer&version=1.0.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Bouncer Logo


Bouncer provides lightweight runtime-only "contracts" for .Net applications. Focus lies on readability, extensibility and a high unit test coverage.

Build Nuget Discord

Installing via NuGet

Install-Package BrutalHack.Bouncer


Import the Nuget Package and check constraints for your methods parameters in a few readable lines. When a constraint is violated, you receive a readable exception including stack trace.

with Bouncer

IBouncer Bouncer;

public CreateNewUser(string name, int age)
  // Do Stuff

without Bouncer

public CreateNewUser(string name, int age)
  if (name == null)
    throw new ArgumentNullException(nameof(name), "Must not be null.");
  if (name.length == 0)
    throw new ArgumentOutOfRangeException(nameof(name), "Must not be empty.");
  if (age < 0)
    throw new ArgumentOutOfRangeException(nameof(age), "Must be positive.");
  // Do Stuff

Custom Rules

Using Extension Methods

Bouncer is easily extendible via C# Extension Methods. By extending IBouncer, your methods are available to all Bouncer instances retrieved via Bouncer.Instance or via Dependency Injection.


using System;
using System.Collections.Generic;

namespace BrutalHack.Bouncer
    public static class BouncerExtensions
        /// <summary>
        /// Validates if a collection contains the given elements
        /// </summary>
        /// <param name="bouncer"></param>
        /// <param name="element"></param>
        /// <param name="collection"></param>
        /// <typeparam name="T">Generic Type of the given list</typeparam>
        /// <exception cref="ArgumentOutOfRangeException">thrown, when the list does not contain the given element.</exception>
        public static void Contains<T>(this IBouncer bouncer, T element, ICollection<T> collection)
            if (!collection.Contains(element))
                throw new ArgumentOutOfRangeException($"Collection {collection} must contain Element {element}.");

Extension methods are used like normal methods on IBouncer:

var collection = new List<string>{"foo", "bar"};
_bouncer.Contains("not included", collection);

Using IsTrue

For rules, which are only needed once, you may also use IsTrue with a boolean expression.

We do not recommend this approach, as it can easily create duplicate code.

var collection = new List<string>{"foo", "bar"};
_bouncer.IsTrue(collection.Contains("not included"));

Planned Features

  • More constraints
  • Easily disable all constraints in production mode
  • .NETStandard 2.0

    • 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
1.0.2 2,176 1/13/2021
1.0.1 106 1/13/2021
1.0.0 2,454 5/2/2020
0.4.1 2,672 8/20/2019
0.3.0 595 6/23/2019