• VS2019 Preview 4 broke conditional compilation symbols in C#
• API has been deprecated
• Android debugging not working in latest release 16.4 "Debuggee returned error code INVALID_ARGUMENT"
• Fixed a frequent UI delay that can occur while using the editor.
• Fixed a crash when an attribute constructor is decorated with itself and Nullable Reference Types is enabled while using C#.
• Fixed an issue that resulted in Visual Studio failing to start or crashing on C# solution load on certain Virtual Machine setups.
• Fixed a bug where user defined conditional compliation symbols are lost when the build properties page is reopened. 

 Blazor is the new Microsoft experimental framework that brings C# into any browser without a plug-in. It holds the promise of modern single-page applications, combined with the ability to use C# and its vast base-class library. Blazor takes C# development to a new level. It’s the final piece necessary to make the language a full-stack development tool. It will have all the power of the popular JavaScript frameworks, but based on the familiar languages, APIs and tooling of the Microsoft .NET Framework. 

Posts about: .NET Native AOT 

Microsoft gets serious about WebAssembly 

Infogram about Xamarin Forms 5.0 

1. C#/.NET Little Wonders: Static Using Statements in C# 6 
   
2. C#6: Using Static Types and Extension Methods  
   

An extensible, cross platform IDE written in C# for Embedded C/C++, .NET Core, Avalonia and Typescript