how to add framework reference?

how do you add a framework reference, similar to the following .csproj line:

    <FrameworkReference Include="Microsoft.AspNetCore.App" />

?

The following code block

void F(Microsoft.AspNetCore.SignalR.Hub h) {}

Gives the following error:

The type or namespace name 'Hub' does not exist in the namespace 'Microsoft.AspNetCore.SignalR' (are you missing an assembly reference?)

With .csproj you don’t need an assembly reference, the above FrameworkReference element includes the SignalR dlls.

[fwaris]

This is starting to affect my current work. Mostly I need to perform visualizations on data, e.g. MSAGL graph viewer that requires Windows Forms.

Priority will be appreciated.

Faisal

[nycdotnet]

It seems like this does work now, but it’s not documented here.

Example: create a brand new notebook, with a C# block with the following content only:

using System.Net.Http.Json;

When you run it, it will return:

Error: (1,23): error CS0234: The type or namespace name 'Json' does not exist in the namespace 'System.Net.Http' (are you missing an assembly reference?)

If you change the code to:

#r "System.Net.Http.Json.dll"
using System.Net.Http.Json;

It will work. This should be improved in the docs for #r in my opinion (and ideally there should be some sort of suggestion to import the corresponding system DLL like VS and Rider do).