Added: C# Language Design Notes for Mar 28, 2017

[MadsTorgersen]

C# Language Design Notes for Mar 28, 2017

Design some remaining 7.1 features

1. Fix pattern matching restriction with generics
2. Better best common type

Please discuss.

[DavidArno]

When looking at pattern matching restrictions with generics, please take Is T expressions result in CS8121 error if sealed class, implementing a generic interface, is used for T, as this scenario has caused me to have to write more complex code on a number of occasions already.

[CyrusNajmabadi]

@DavidArno the PR to address that issue was merged here: dotnet/roslyn#18784

Is there something additional you'd like done? Thanks!

[DavidArno]

@CyrusNajmabadi

That's great news. Thanks.

Re would I like anything else done, could v7.1 be released please, so I can make use of it? 😉