Top runtime issues

Do a pass over CoreFX for the C# readonly members feature

area-Meta enhancement up-for-grabs

Compute a list of OOB packages that would benefit from getting a .NET Framework targetted asset and make require changes so that they cross-compile

area-Infrastructure-libraries packaging

Allows setting of 4 spaces indentation or 2 spaces indentation in JsonSerializerOptions.

area-System.Text.Json enhancement

Proposal: Add AsyncEnumerable.Empty<T>()

area-System.Linq untriaged

Add Bson integration

area-System.Text.Json enhancement

Dump at least partial stack trace for stack overflow

area-PAL-coreclr

[RFC] Assertion failed 'OperIs(GT_NOP, GT_CALL, GT_FIELD_LIST, GT_COMMA) || OperIsCompare() || OperIsLong() || OperIsSIMD() || OperIsHWIntrinsic()'

area-CodeGen-coreclr

Use of `EditorBrowsableState.Never` leads language service to claim it's gone

api-approved area-Meta

ConcurrentDictionary costs much more performance than Dictionary

area-System.Collections

API proposal: string.SubstringUntil/string.SubstringAfter

api-suggestion area-System.Runtime