System.Linq.Queryable breaking changes in .NET 6

[eiriktsarpalis]

Hi, I'm the area owner for System.Linq in the .NET libraries team. As part of our efforts to improve LINQ in .NET 6 we have added a small number of method overloads to the queryable APIs. This is known to break query providers whose reflection code does not account for method overloading. I have filed a breaking change issue which contains instructions on how to mitigate the problem.

I'm contacting you directly since we have received reports that your nuget package System.Linq.Dynamic.Core is also affected by this change.

[StefH]

Hello @eiriktsarpalis, thanks for notifying these changes.

Can you give an ETA when these changes will be published to .NET 6 ?

BTW: I need to read all the information you provided to assess the changes required in this project.

[eiriktsarpalis]

Hi @StefH, some of these changes can already be found in .NET 6 preview 2.

[StefH]

Preview versions for EF 6 are available on NuGet.

[wihrl]

How extensive are the changes necessary to fix this? Can I expect a fix anytime soon?

I ended up having to downgrade a project back to .NET 5 because of this.

[StefH]

@wihrl and @enchev

What version from System.Linq.Dynamic.Core did you use?
(Note that there is a https://www.nuget.org/packages/Microsoft.EntityFrameworkCore.DynamicLinq - 6.2.11-preview.4.21253.1)

[wihrl]

I used 1.2.11.
I cannot install the Microsoft.EntityFrameworkCore.DynamicLinq package as it requires EF Core 6, but I'm using 3.1.17 and cannot upgrade because of other packages.

Here is the error I'm getting:

I believe that a dynamic .Where call on an IQueryable is causing it. It works fine in .NET 5.

[StefH]

@wihrl
Now I understand.

This is about .NET 6, and not about EF 6.

I'll look into this.

[tirth-uhn]

Hi - we've also run into this issue using Radzen.Blazor with .NET 6 preview, it's described on the Radzen forums which actually references this issue.

[StefH]

@wihrl
@tirth-uhn

Please try version 1.2.12-preview-01 from MyGet:
https://www.myget.org/feed/system-linq-dynamic-core/package/nuget/System.Linq.Dynamic.Core

[sofiageo]

@StefH It works fine for me on a Radzen RadzenDataGrid. It used to throw an exception before upgrading to 1.2.12-preview-01

p.s I've only tested filtering on a text column.

[tirth-uhn]

@StefH it works! Thanks so much for the quick fix.

[wihrl]

It works for me too.

[StefH]

@sofiageo
@wihrl
@tirth-uhn
@enchev

I'll try to release an official 1.2.12 on NuGet this weekend.

Note that I'll also create a new issue to also support the new Queryable methods which are introduced in .NET 6

[StefH]

#537

[Mike-E-angelo]

Woohoo bless you all. +1 to being brought here due to Radzen. Installed the latest preview and ERRORS BE GONE. Well, until the next one. 😅

Appreciate all the work you are doing out there!

[StefH]

@Mike-E-angelo
You can also install the official 1.2.12 version.

[Mike-E-angelo]

Gosh @StefH you're right I got so excited once I saw the preview I stopped reading the rest of the thread and just upvoted. 😆 Updated and installed. 👍