Nullable.Extended.Analyzer 1.19.0

dotnet add package Nullable.Extended.Analyzer --version 1.19.0
                    
NuGet\Install-Package Nullable.Extended.Analyzer -Version 1.19.0
                    
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="Nullable.Extended.Analyzer" Version="1.19.0">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="Nullable.Extended.Analyzer" Version="1.19.0" />
                    
Directory.Packages.props
<PackageReference Include="Nullable.Extended.Analyzer">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
                    
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 Nullable.Extended.Analyzer --version 1.19.0
                    
#r "nuget: Nullable.Extended.Analyzer, 1.19.0"
                    
#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 Nullable.Extended.Analyzer@1.19.0
                    
#: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=Nullable.Extended.Analyzer&version=1.19.0
                    
Install as a Cake Addin
#tool nuget:?package=Nullable.Extended.Analyzer&version=1.19.0
                    
Install as a Cake Tool

Nullable.Extended.Analyzer

A Roslyn analyzer that warns about every usage of the null-forgiving operator ! that is not justified by a comment, so everyone knows why it is needed. It works in any IDE and on CI.

dotnet add package Nullable.Extended.Analyzer

Justification comments

A justification comment is one or more single line comments directly above the statement or declaration. The first comment line must start with // ! , followed by the justification text:

// ! This is only needed to demo the feature
var text = value1!.ToString();

A code fix is offered that adds the scaffold for the comment.

Diagnostics

Id Context
NX0001 Any other usage of the null-forgiving operator.
NX0002 Null-forgiving operator on the null or default literals at any other statement.
NX0003 Null-forgiving operator inside lambda expressions.
NX0004 Null-forgiving operator on the null or default literals at init only property assignment.

The severity of each category can be configured in your .editorconfig file:

[*.cs]
dotnet_diagnostic.NX0001.severity = error
dotnet_diagnostic.NX0003.severity = suggestion

More

See the project page for the Visual Studio extension, which also detects operators that are no longer needed, and for an MCP server that helps AI assistants to find and fix unjustified operators in large solutions.

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

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Version Downloads Last Updated
1.19.0 4,932 10/27/2026
1.18.2 2,409 10/26/2026
1.18.1 122 10/26/2026
1.18.0 1,444 10/25/2026
1.17.1 3,467 10/22/2026
1.17.0 7,757 10/18/2026
1.16.6891 127,521 9/2/2026
1.16.1 80 10/18/2026
1.15.6581 1,091,360 4/30/2025
1.15.6495 132,384 12/20/2024
1.15.6169 407,150 12/26/2023
1.14.6129 47,833 12/6/2023
1.10.4539 261,798 8/28/2021
1.9.4534 578 8/27/2021
1.8.4532 612 8/27/2021
1.7.4526 598 8/26/2021
1.2.4089 4,507 2/21/2021
1.0.4033 2,709 2/4/2021
1.0.0-beta07 543 1/19/2021
1.0.0-beta06 548 1/16/2021
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