Soften .NET 12 language to reflect uncertainty in opt-in/opt-out behavior #357
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Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
agocke
reviewed
Dec 16, 2025
| * In .NET 11, the feature will be off-by-default and in preview, and we will not be recommending broad adoption by arbitrary users until we have collected more | ||
| usability feedback and dialed in the enforcement. Users will be able to opt-in to the feature preview by putting `<MemorySafetyRules>preview</MemorySafetyRules>` | ||
| into their project files. | ||
| * In the .NET 12 or 13 timeframe, once we have the ecosystem experience that we are fully confident in, we will have an opt-in flag `<MemorySafetyRules>2</MemorySafetyRules>`. Users that take no action will see no changes. |
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Please also note that we have not settled on a .NET 12 behavior (opt in or opt-out)
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Updated to explicitly note that we have not settled on whether .NET 12 will be opt-in or opt-out by default. (commit 4d943bf)
Copilot
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[WIP] Update documentation for memory safety based on feedback
Soften .NET 12 file-based programs language to reflect uncertainty
Dec 16, 2025
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
Copilot
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changed the title
Soften .NET 12 file-based programs language to reflect uncertainty
Soften .NET 12 language to reflect uncertainty in opt-in/opt-out behavior
Dec 16, 2025
jkotas
reviewed
Dec 16, 2025
| usability feedback and dialed in the enforcement. Users will be able to opt-in to the feature preview by putting `<MemorySafetyRules>preview</MemorySafetyRules>` | ||
| into their project files. | ||
| * In the .NET 12 or 13 timeframe, once we have the ecosystem experience that we are fully confident in, we will have an opt-in flag `<MemorySafetyRules>2</MemorySafetyRules>`. Users that take no action will see no changes. | ||
| * In the .NET 12 or 13 timeframe, once we have the ecosystem experience that we are fully confident in, we will make the feature available via `<MemorySafetyRules>2</MemorySafetyRules>`. We have not yet settled on whether this will be opt-in or opt-out by default. |
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Suggested change
| * In the .NET 12 or 13 timeframe, once we have the ecosystem experience that we are fully confident in, we will make the feature available via `<MemorySafetyRules>2</MemorySafetyRules>`. We have not yet settled on whether this will be opt-in or opt-out by default. | |
| * In the .NET 12 or 13 timeframe, once we have the ecosystem experience that we are fully confident in, we will make the feature available via `<MemorySafetyRules>2</MemorySafetyRules>`, first as an opt-in. Our aspiration is to enable the new memory safety rules by default with opt-out eventually. The approach will be informed by the ecosystem experience we gain with .NET 11. |
I think we can say where we would like to be.
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Applied the suggestion. (commit 5c0a06d)
Co-authored-by: agocke <515774+agocke@users.noreply.github.com>
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December 16, 2025 23:24
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Dec 16, 2025
* Update memory safety enforcement details in documentation Clarified opt-in and opt-out mechanisms for memory safety rules in .NET 11 and 12. * Soften .NET 12 language to reflect uncertainty in opt-in/opt-out behavior (#357) * Initial plan * Update .NET 12 file-based programs plan to reflect uncertainty Co-authored-by: agocke <515774+agocke@users.noreply.github.com> * Improve readability by breaking long sentence into shorter ones Co-authored-by: agocke <515774+agocke@users.noreply.github.com> * Further improve readability with shorter sentences Co-authored-by: agocke <515774+agocke@users.noreply.github.com> * Clarify that .NET 12 opt-in/opt-out behavior is undecided Co-authored-by: agocke <515774+agocke@users.noreply.github.com> * Apply suggestion to clarify opt-in first, then aspiration for opt-out Co-authored-by: agocke <515774+agocke@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: agocke <515774+agocke@users.noreply.github.com> --------- Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
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