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[Breaking change] Removal of built-in WinRT support in .NET 5.0 #37672

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AaronRobinsonMSFT opened this issue Jun 9, 2020 · 3 comments · Fixed by #36715
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[Breaking change] Removal of built-in WinRT support in .NET 5.0 #37672

AaronRobinsonMSFT opened this issue Jun 9, 2020 · 3 comments · Fixed by #36715
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area-System.Runtime.InteropServices breaking-change Issue or PR that represents a breaking API or functional change over a prerelease.
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5.0.0

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@AaronRobinsonMSFT
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AaronRobinsonMSFT commented Jun 9, 2020 •
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[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.
@AaronRobinsonMSFT AaronRobinsonMSFT added area-System.Runtime.InteropServices breaking-change Issue or PR that represents a breaking API or functional change over a prerelease. labels Jun 9, 2020
@AaronRobinsonMSFT AaronRobinsonMSFT added this to the 5.0 milestone Jun 9, 2020
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@jkoritzinsky jkoritzinsky mentioned this issue Jun 9, 2020
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@Nukepayload2
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Nukepayload2 commented Jun 11, 2020 •
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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
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svick commented Jun 11, 2020

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

@AaronRobinsonMSFT
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AaronRobinsonMSFT commented Jun 11, 2020 •
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@Nukepayload2 there are recommended next steps linked above in dotnet/docs#18875.

This was referenced Jun 12, 2020
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@AaronRobinsonMSFT AaronRobinsonMSFT mentioned this issue Jul 15, 2020
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jaredpar added a commit to jaredpar/roslyn that referenced this issue Jul 22, 2020
@jaredpar
Move to the .NET 5 SDK
fd3535e 
This is necessary for us to test features like covariant returns because
we need to be able to target `net5.0` in our unit test projects.

Issues encountered in this update:

- WinRT is no longer supported in .NET 5. As a result we no longer multi-target
.NET Core in our WinRT test assembly as well as having to disabling a
few WinRT tests in others.  dotnet/runtime#37672
- Change our Debugger Proxy tests to react to a runtime change
dotnet/runtime@c362923
- Work around .NET5 P6 bug dotnet/sdk#11862
jaredpar added a commit to dotnet/roslyn that referenced this issue Jul 22, 2020
@jaredpar
Move to the .NET 5 SDK (#46038)
d5fafa1 
* Move to the .NET 5 SDK

This is necessary for us to test features like covariant returns because
we need to be able to target `net5.0` in our unit test projects.

Issues encountered in this update:

- WinRT is no longer supported in .NET 5. As a result we no longer multi-target
.NET Core in our WinRT test assembly as well as having to disabling a
few WinRT tests in others.  dotnet/runtime#37672
- Change our Debugger Proxy tests to react to a runtime change
dotnet/runtime@c362923
- Work around .NET5 P6 bug dotnet/sdk#11862
This was referenced Jul 23, 2020
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@tebeco tebeco mentioned this issue Sep 15, 2020
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@richlander richlander mentioned this issue Sep 22, 2020
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@AaronRobinsonMSFT AaronRobinsonMSFT mentioned this issue Nov 30, 2020
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Remove built-in WinRT support from the runtime jkoritzinsky/runtime
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