Compability with .NET Core 3.0.0-preview-27122-01

[koster26]

When using DotNetify with .NET Core 2.2 SDK I haven't problem. However, I was forced target the project to .NET Core 3.0 SDK (I need support for the serial port on Linux) and got exception.

IDE: Visual Studio 2019 16.0.0 Preview 1.1
SDK: .NET Core 3.0 v3.0.0-preview-27122-01

[dsuryd]

It won't be good practice to keep up with unstable preview versions. This library will only target compatibility with the release version of .NET Core 3.0.

[RobertTheGrey]

Any thoughts on when .NET Core 3 will be the default target now that it's released? We're keen to use some of the latest Signal-R capabilities. We can see the Blazor experimental branch already uses it, so is it close to being possible?

[dsuryd]

You can use the current library version with .NET Core 3 simply by replacing :

app.UseSignalR(routes => routes.MapDotNetifyHub());

with

app.UseRouting();
app.UseEndpoints(endpoints =>
{
    endpoints.MapHub<DotNetifyHub>("/dotnetify");
});

Additionally, switch the SignalR JSON protocol back to using Newtonsoft.Json.

[RobertTheGrey]

Many thanks - we'll give that a shot

[fastrocket]

When I edit the HelloWorld.WebPack .csproj file to use netcoreapp3.0 in Visual Studio 2019:

netcoreapp3.0

I get this error:

Severity Code Description Project File Line Suppression State Error NETSDK1045 The current .NET SDK does not support targeting .NET Core 3.0. Either target .NET Core 2.1 or lower, or use a version of the .NET SDK that supports .NET Core 3.0. HelloWorld.WebPack C:\Program Files\dotnet\sdk\2.1.500\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.TargetFrameworkInference.targets 137

Any chance you could update at least one demo to use .NET Core 3.0? Or know how to fix the above?

(I've successfully built netcoreapp3.0 apps on this machine before.)

[dsuryd]

If you run that csproj from a clone of this repo, then there's a global.json at the project root that's restricting the SDK to v2.1.5. Either edit that to v3.0 SDK, or remove it entirely.

[fastrocket]

Thanks, that did it!

Here are the steps:

• Edit HelloWorld.WebPack.csproj and change TargetFramework to netcoreapp3.0
• and delete the line with the PackageReference to Microsoft.AspNetCore.App since .NET Core 3 doesn't need it
• Change global.json as above (I deleted everything). Restart VS2019 or unload/load project.
• Add Nuget package Microsoft.AspNetCore.SpaServices since .NET Core 3 separates various things into individual Nuget packages