How to remove warning AD0001 in .Net Core project?

Question

This is the warning message

warning AD0001: Analyzer 'Microsoft.AspNetCore.Mvc.Analyzers.TopLevelParameterNameAnalyzer' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'.

Any kind of help is appreciated. Thank you

Silveira

This GitHub comment could help you: github.com/dotnet/aspnetcore/issues/… – Hanaper

Answer 1

As per: https://github.com/dotnet/aspnetcore/issues/41794

Adding this to a PropertyGroup in the .csproj file fixed this for me in minimal API .net 6.0.

    <NoWarn>AD0001</NoWarn>

The cause in my case is the way the route mapping is done.

// I use this because it's cleaner and the GetAllTodo function has DI parameters
app.MapGet("/manage/todos", GetAllTodo);

// but the following does not raise AD0001
app.MapGet("/manage/todos", () => GetAllTodo());

Ammamaria

This should be the answer. Just happened to me as we upgraded to dotnet 8. Adding the () => fixed the issue – Unicuspid

Answer 2

Check this https://github.com/dotnet/aspnetcore/issues/14723

Disable analyzer in Project file for testing purpose only.

<PropertyGroup> <DisableImplicitAspNetCoreAnalyzers>true</DisableImplicitAspNetCoreAnalyzers>
</PropertyGroup>

After disabling this, check if you can still build the project.Check if any install package have prior version dependency.

Uribe

Answer 3

I have been accessing

Microsoft.AspNetCore.MVC

package to access HttpContextAccessor and that causes the WARNING.

I solved this by reinstalling dependency/reference for HttpContextAccesstor and it lands me to this package

Microsoft.AspNetCore.Http.Abstractions

SOLVED

Silveira