[Breaking change] Removal of built-in WinRT support in .NET 5.0

[AaronRobinsonMSFT]

[Breaking change] Removal of built-in WinRT support in .NET 5.0

With the work to provide sustainable and long term support for WinRT consumption in .NET, the built-in support has been removed. This is a high impact change to all existing libraries and application that rely on the built-in WinRT support.

The replacement for built-in WinRT support is the C#/WinRT tool chain.

For complete details see the official doc issue at dotnet/docs#18875.

[Nukepayload2]

How can I upgrade my .NET Framework 4.x and .NET Core 3.1 VB apps to .NET 5 after this breaking change? Many of them are using WinRT APIs to send toast notifications, share files or save settings.

[svick]

@Nukepayload2 You're supposed to use C#/WinRT for that. Have you tried it?

[AaronRobinsonMSFT]

@Nukepayload2 there are recommended next steps linked above in dotnet/docs#18875.