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c#interceptor.net-8.0

.NET 8 - C#12 - preview try interceptors

I would like to try the new C# 12 preview function Interceptors but can't seem to get them to work.

The page says

Preview feature Introduced in Visual Studio 17.7, preview 3.

So I tried using Jetbrains Rider. Because I have seen Nick Chapsas Youtube video

My project file looks like this:

<Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
        <OutputType>Exe</OutputType>
        <TargetFramework>net8.0</TargetFramework>
        <ImplicitUsings>enable</ImplicitUsings>
        <Nullable>enable</Nullable>
        <LangVersion>preview</LangVersion>
        <Features>InterceptorsPreview</Features>
    </PropertyGroup>
</Project>

I used the sample code from this page

I have looked at the Youtube video some more and saw that the InterceptsLocationAttribute was in one of his helper files so I tried adding the code for that attribute to my code project.

Than the code compiles bus still not works. The code execution did not jump to the interception code.

Solution

  • Update: Now that Visual Studio 17.7, preview 3 has been released, it works as intended in visual studio preview

    I got it working the changes are already in the main branch of https://github.com/dotnet/roslyn so by building that locally i can start a new version of visual studio and run the code in that. That makes it work, so I think Nick did the same.