JJ.Framework.Validation.Legacy 0.253.6073

Prefix Reserved
.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package JJ.Framework.Validation.Legacy --version 0.253.6073
                    


                    

                
NuGet\Install-Package JJ.Framework.Validation.Legacy -Version 0.253.6073
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="JJ.Framework.Validation.Legacy" Version="0.253.6073" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="JJ.Framework.Validation.Legacy" Version="0.253.6073" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="JJ.Framework.Validation.Legacy" />
                    


                            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 JJ.Framework.Validation.Legacy --version 0.253.6073
                    


                    

                
#r "nuget: JJ.Framework.Validation.Legacy, 0.253.6073"
#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 JJ.Framework.Validation.Legacy@0.253.6073
#: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=JJ.Framework.Validation.Legacy&version=0.253.6073
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=JJ.Framework.Validation.Legacy&version=0.253.6073
                    


                            Install as a Cake Tool

JJ.Framework.Validation.Legacy

Historic release for compatibility with older projects from 2015, now upgraded to the newest .NET, doc comments everywhere and compatible with code trimming and native compilation.

Contains a class FluentValidator. It offers a neat fluent notation:

For(() => Thing.Value).NotNull().Max(100);

If you separate validations from the rest of your code and turn them into validator classes, your business rules may become better maintainable. The validation messages are dry pairs of keys and message texts, which makes the output of the validations easily integratable with any other system. The set of fluent methods might be incomplete, but we just add things at the time we need it.

We use this framework to support our developments, and extend it on the fly, as needed.

This framework is also kind of a proof that you do not need an external validation framework. You can easily do it yourself.

Release Notes

2026-03-15 | 0.251/4.1 : Legacy
  • Historic version + full test coverage / IntelliSense docs / code trimming / native AOT support
  • .NET 10, 9, 8, 7, 6, 5, 4.6.1 / .NET Standard 2.0, 2.1
  • FluentValidator syntax:
    For(() => player.TotalScore, "Total Score").Min(0).Max(100);
  • NotNull, NotNullOrWhiteSpace, In, Is, IsNot, NotZero, Above, Min, Max, NotInteger, IsEnumValue
  • IValidator / ValidatorBase members:
    IsValid (boo), ValidationMessages, Verify() (throws)
  • Sub-validators and message prefixes:
    "Address: Street is required."
  • Localization: English (en-US) and Dutch (nl-NL)
2026-04-04 | 0.252/4.4 : Docs
  • More IntelliSense popups
  • Reworked README

💬 Feedback

Got feedback or questions? You can reach me here.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  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 is compatible.  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 is compatible.  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. 
.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 is compatible. 
.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. 
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Version Downloads Last Updated
0.253.6073 42 4/8/2026
0.252.6001 57 4/4/2026
0.251.5729 91 3/16/2026
0.251.5705 84 3/15/2026