Top runtime issues

Add bool TryGetValue(TKey, out TItem) method to a KeyedCollection<,> class

api-approved area-System.Collections up-for-grabs

Support windows authentication for SqlClient on Xplat

area-System.Data.SqlClient os-linux

Debug.Assert(false) does not behave as expected compared to full CLR

area-System.Diagnostics enhancement up-for-grabs

Perf: DateTime.Now 3x slower on Linux

area-System.Runtime enhancement os-linux tenet-performance up-for-grabs

Make Enumerable.Any use the same optimizations that Count has (ICollection checks)

area-System.Linq enhancement tenet-performance up-for-grabs

Provide a sorting algorithm with good behavior on nearly-sorted inputs.

api-needs-work area-System.Collections tenet-performance up-for-grabs

Sorting sequences

api-needs-work area-System.Linq enhancement

System.System.Net.Http.FormUrlEncodedContent(...) can't handle very long parameters/values

area-System.Net.Http bug

Unix: Why not use Unix Domain Sockets for Named Pipes?

area-System.IO

URI class throws with Unix file paths

area-System.Net enhancement os-linux tenet-compatibility up-for-grabs