.NET Core

The 2019 IAAF World Rankings document the best performing athletes in the sport of athletics, per the International Association of Athletics Federations (IAAF) individual athlete ranking system. It was the first year that the IAAF used the system. Individual athletes are assigned a points score best on an average of their best recent competition performances. The performance scoring is primarily based on the time or mark of the athlete, plus additional points for their placing within the competition, and some minor modifications based on the conditions. The world rankings are updated each Wednesday. As of 2 October 2019, the number

.NET Core 1.0, announced on November 12, 2014, was released on June 27, 2016, along with Microsoft Visual Studio 2015 Update 3, which enables .NET Core development. .NET Core 1.0.4 and .NET Core 1.1.1 were released along with .NET Core Tools 1.0 and Visual Studio 2017 on March 7, 2017..NET Core 2.0 was released on August 14, 2017, along with Visual Studio 2017 15.3, ASP.NET Core 2.0, and Entity Framework Core 2.0. .NET Core 2.1 was released on May 30, 2018. NET Core 2.2 was released on December 4, 2018..NET Core 3 was announced on May 7, 2019, at Microsoft Build. Version 3.0.0 was released September 23 2019. With .NET Core 3 the framework will get support for development of desktop application software, artificial intelligence/machine learning and IoT apps.The next release after .NET Core 3.1 will be .NET 5. The .NET Framework will be deprecated, and .NET 5 will be the only .NET going forward – hence the removal of the "Core" branding and skipping of version 4 to avoid confusion with the .NET Framework 4.x. The first preview of .NET 5 was released on March 16, 2020.

.NET Core supports four cross-platform scenarios: ASP.NET Core web apps, command-line apps, libraries, and Universal Windows Platform apps. Prior to .NET Core 3.0, it did not implement Windows Forms or Windows Presentation Foundation (WPF) which render the standard GUI for desktop software on Windows; however, .NET Core 3 supports desktop technologies Windows Forms, WPF and Universal Windows Platform (UWP). .NET Core supports use of NuGet packages. Unlike .NET Framework, which is serviced using Windows Update, .NET Core relies on its package manager to receive updates.Similar to how the .NET Framework implements the Common Language Infrastructure (CLI) via the Common Language Runtime (CLR) and the Framework Class Library (FCL), the two main components of .NET Core are CoreCLR and CoreFX, respectively.

As a CLI implementation of the foundational Standard Libraries, CoreFX shares a subset of .NET Framework APIs, however, it also comes with its own APIs that are not part of the .NET Framework. A variant of the .NET Core library is used for UWP.The .NET Core command-line interface offers an execution entry point for operating systems and provides developer services like compilation and package management.

.NET Core fully supports C# and F# (and C++/CLI as of 3.1; only enabled on Windows) and partially supports Visual Basic .NET.

.NET Core is a free and open-source, managed computer software framework for Windows, Linux, and macOS operating systems. It is a cross-platform successor to .NET Framework. The project is primarily developed by Microsoft and released under the MIT License.

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Currently VB.NET compiles and runs on .NET Core, but the separate Visual Basic Runtime is not implemented. Microsoft announced that .NET Core 3 would include the Visual Basic Runtime, after two years the announcement was updated to .NET Core 5.

As a CLI implementation of Virtual Execution System (VES), CoreCLR is a complete runtime and virtual machine for managed execution of .NET programs and includes a just-in-time compiler called RyuJIT. .NET Core also contains CoreRT, the .NET Native runtime optimized to be integrated into AOT compiled native binaries.