WinRT/C# component requirements (does it need .NET?)

Question

WinRT/C# component requirements (does it need .NET?)

RW 21

Hi,

I just came across several links that discuss how to author WinRT components using a CSharp library.

Source (see below) : authoring.md, authoring, use-csharp-component-from-cpp-winrt

It states that I can write a C# library and package it into a WinRT component. However, it's not clear whether having .NET is a requirement.
In one link, it states .NET is required. In another, .NET is recommended and another link says its supported.

In my scenario, I have created a Csharp library class (that also has event/delegate calls) that does not use .NET. The goal is to consume it in a WinRT/C++ UWP app.
Will this still be possible?

Junjie Zhu - MSFT 21,646 Reputation points

2022-10-20T02:37:25.043+00:00

Hi @RW ,
Welcome to Microsoft Q&A!

Could you tell me why you don't want to use .NET in a Csharp library class? To make the program depend on less environment?

Thank you,
Junjie
RW 21 Reputation points

2022-10-21T18:38:11.07+00:00

Hi Junjie,

We'd like to develop our lib to be as free as possible from additional libraries/add-ons. Therefore, when another user uses it, they'll just have to import winrt/c++ component and away they go.
However, I've now encountered another issue - my delegate/event code in my C# library appears to be incompatible with the import. C++/WinRT is throwing a nested error.

Thank you.

Regards,
Ron.
Junjie Zhu - MSFT 21,646 Reputation points

2022-10-24T03:00:02.807+00:00

About Event code, you can refer to this document

https://learn.microsoft.com/en-us/windows/uwp/cpp-and-winrt-apis/move-to-winrt-from-csharp#registerrevoke-an-event-handler

1 answer

Your answer

Junjie Zhu - MSFT 21,646 Reputation points

2022-10-20T02:37:25.043+00:00

Hi @RW ,
Welcome to Microsoft Q&A!

Could you tell me why you don't want to use .NET in a Csharp library class? To make the program depend on less environment?

Thank you,
Junjie
RW 21 Reputation points

2022-10-21T18:38:11.07+00:00

Hi Junjie,

We'd like to develop our lib to be as free as possible from additional libraries/add-ons. Therefore, when another user uses it, they'll just have to import winrt/c++ component and away they go.
However, I've now encountered another issue - my delegate/event code in my C# library appears to be incompatible with the import. C++/WinRT is throwing a nested error.

Thank you.

Regards,
Ron.
Junjie Zhu - MSFT 21,646 Reputation points

2022-10-24T03:00:02.807+00:00

About Event code, you can refer to this document

https://learn.microsoft.com/en-us/windows/uwp/cpp-and-winrt-apis/move-to-winrt-from-csharp#registerrevoke-an-event-handler

Answer 1

Bruce (SqlWork.com) 78,086 Volunteer Moderator

there is a restricted runtime support for UWP. for supported libraries see :

https://learn.microsoft.com/en-us/dotnet/api/?view=dotnet-uwp-10.0&preserve-view=true

RW 21 Reputation points

2022-10-21T18:42:26.743+00:00

Thank you Bruce. I'll take a look into it. It appears I have an additional layer of code to change - the delegate/event handlers in my C# is returning a nested incompatibility in the WinRT/C++ project.
Regards,
Ron.

Share via

WinRT/C# component requirements (does it need .NET?)

1 answer

Your answer