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Understanding .NET 2015

The post gives a high-level map of .NET 2015 and treats .NET Core as the main foundation for three investment areas: platform innovation, open source development, and cross-platform support. It also places .NET Framework 4.6, Roslyn, RyuJIT, .NET Native, ASP.NET 5, and Universal Windows apps into that larger picture.

Reading notes
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  • .NET 2015 is presented as a set of related components rather than a single release.
  • The three key investment areas for .NET Core are innovation, open source, and cross-platform support.
  • .NET Framework 4.6 adds new APIs, event tracing improvements, and bug fixes, and ships with Windows 10 and Windows Update.
  • .NET Core 5 is described as modular, open source, side-by-side deployable, and supported on Windows, Linux, and Mac OSX.
  • .NET Core includes refactored base class libraries and runtime components, including RyuJIT, the garbage collector, and native interop.
  • Roslyn is the open-source compiler platform for C# and Visual Basic, with code analysis APIs and platform-independent IL output.
  • RyuJIT is the default x64 JIT compiler and is described as reducing startup time and adding SIMD support.
  • .NET Native compiles C# ahead of time to native machine code, uses a minimal CLR runtime, and is described as improving startup time and memory use for Windows Store apps.
  • Windows Forms, WPF, ASP.NET Web Forms, and MVC 5 remain part of .NET Framework 4.6.
  • ASP.NET 5 is described as a lean app model that can run on .NET Framework 4.6 or .NET Core 5.
  • Universal Windows apps share source code across Windows Phone and Windows apps and run on .NET Native.
  • .NET Core uses modular references, shared BCL implementation, NuGet packages, and app-local deployment.
  • The post explains that in ASP.NET 5, code changes can be saved and refreshed in the browser without an explicit rebuild.
  • Many .NET 2015 pieces are open source and stewarded by the .NET Foundation, while the full .NET Framework is only source-open.
  • The post says contributing can also mean filing issues, commenting on proposals, answering questions, or watching activity.