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These proposals will be or are being designed by the Language Design Team during the current design timeframe. Not all the proposals in this bucket will actually make it into the language for the next version of C#, but they will get some design time from the team.

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Working Set

Five ideas for improving working with fixed buffers

[Proposal]: method attribute target for records for targeting primary constructor

[Proposal]: Interceptors

[Proposal]: Block-bodied switch expression arms

[Proposal]: Enhanced switch statments

[Proposal]: User-defined positional patterns

[Proposal]: Ignored Directives Support

[Proposal]: Variable declarations under disjunctive patterns

[Proposal]: <code>field</code> keyword in properties

[Proposal]: Dictionary expressions

[Proposal]: Unbound generic types in <code>nameof</code>

[Proposal]: Null conditional assignment

[Proposal]: First-Class Span Types

[Proposal]: Breaking change warnings

[Proposal]: Type Classes (aka Concepts, Structural Generic Constraints)

[Proposal]: Discriminated Unions

[Proposal]: async method exception filter

[Proposal]: Relax requirement that type be enumerable to participate in collection expressions

[Proposal]: Closed Enums

[Proposal]: extensions

[Proposal]: Add private and namespace accessibility modifiers for top-level types.

[Proposal]: Collection Expression Arguments

[Proposal]: <code>fieldof()</code>

[Proposal]: <code>params in</code> parameters

[Proposal]: static abstract interfaces and static classes

Working Set

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