BrutalHack.Bouncer 1.0.2

dotnet add package BrutalHack.Bouncer --version 1.0.2
NuGet\Install-Package BrutalHack.Bouncer -Version 1.0.2
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="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
#r "nuget: BrutalHack.Bouncer, 1.0.2"
#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.
// 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

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
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. 
.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

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.2 6,184 1/13/2021
1.0.1 733 1/13/2021
1.0.0 3,030 5/2/2020
0.4.1 3,333 8/20/2019
0.3.0 1,170 6/23/2019