Added: LDM notes for Sept. 24, Sept. 26, Oct. 10, and Oct. 15

[agocke]

C# Language Design Notes for Sept. 24

F#/C# combined LDM

1. What new C# features are going to require work to get F# support?
2. How can the design of C# features play well with the broader .NET environment?

C# Language Design Notes for Sept. 26

1. Warning waves

C# Language Design Notes for Oct. 10

1. Open issues for pattern matching

C# Language Design Notes for Oct. 15

1. Function pointers
2. Readonly struct members
3. Syntax for async streams

[yaakov-h]

Jared proposes Git SHA.

I thought LDM notes were supposed to be unattributed? 🙃

[bondsbw]

Regarding funcptr, unnamed/inferred lambdas were discussed in #1694.

[gafter]

I thought LDM notes were supposed to be unattributed?

I think this is "Jared" in the generic, non-specific sense. 🙃