如何在 .csproj 中引用 NuGet 包

Question

I need to use <attrib>[Docs] element in the .csproj file of my .NET Framework console application.

It's nested in the <Target Name="BeforeBuild"> element because I need to edit attributes of a few files before building, here is the full code from the .csproj:

<Target Name="BeforeBuild">
    <Attrib Files="App.config" ReadOnly="false" />
    <Attrib Files="Ocelot.json" ReadOnly="false" />
    <Attrib Files="OcelotLogging.json" ReadOnly="false" />
</Target>

When the code is written as this, editor gives me this error: Task 'Attrib' is not defined .

What have I tried?

• I would use the <UsingTask> element, where the parameter is the path to the NAnt.Core NuGet package. Whole code looks like this:

  <UsingTask TaskName="Attrib" AssemblyFile="C:\\Users\\UserName\\.nuget\\packages\\nant.core\\0.92.0\\lib\\net40\\NAnt.Core.dll" /> <Target Name="BeforeBuild"> <Attrib Files="App.config" ReadOnly="false" /> <Attrib Files="Ocelot.json" ReadOnly="false" /> <Attrib Files="OcelotLogging.json" ReadOnly="false" /> </Target> But the error doesn't dissapear. When I try to compile the application anyway, I got following error: The "Attrib" task could not be loaded from the assembly C:\\Users\\UserName\\.nuget\\packages\\nant.core\\0.92.0\\lib\\net40\\NAnt.Core.dll. Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask. The "Attrib" task could not be loaded from the assembly C:\\Users\\UserName\\.nuget\\packages\\nant.core\\0.92.0\\lib\\net40\\NAnt.Core.dll. Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask.

Answer 1

I think you are mixing NAnt and MSBuild tasks.

NAnt tasks are written on a .build file and called by passing this file to the NAnt executable like explained here . You load them with loadtasks .

MSBuild tasks however can be used like you want, in the .csproj file. You use usingtask to work with them.

So in your case, what you can do is use the msbuildtasks package which also have an attrib task.

Install the package:

The latest build can be downloaded from the releases section. https://github.com/loresoft/msbuildtasks/releases

The MSBuild Community Tasks library is also available on nuget.org via package name > MSBuildTasks.

To install MSBuildTasks, run the following command in the Package Manager Console

PM> Install-Package MSBuildTasks

The installation also make sure you can then use the tasks in your csproj without needing to use usingtask , so:

<Target Name="BeforeBuild">
    <Attrib Files="App.config" ReadOnly="false" />
    <Attrib Files="Ocelot.json" ReadOnly="false" />
    <Attrib Files="OcelotLogging.json" ReadOnly="false" />
</Target>

Note they are other way to do this with MSBuild, this one is only the closest to what you wrote.