What’s new in .NET Core 3.0?

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What’s new in .NET Core 3.0?

The latest version of .NET Core platform is 3.0 .NET and with this version, most of the user wants to know that what’s new in .net core 3.0 and here we will discuss about it. Let’s start!!

Recently, Microsoft has announced the addition of the latest version of .NET Core that will help in supporting building desktop applications using WinForms, Entity Framework 6, and WPF. The company also announced some exciting updates to its .NET Framework which allow the user to use the new modern controls from UWP from the existing WPF and WinForms applications.

.NET Core 3.0 provides developers with a robust, flexible, and efficient tool to build amazing desktop apps. With this release, the developers can explore exciting new features, embrace competitive advantages, modernize the desktop application and make it more advanced.

Release dates of Asp.net core versions

.NET Core 1.0

  • .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

  • .NET Core 2.0 was released on August 14, 2017, along with Visual Studio 2017 15.3, ASP.NET Core 2.0, and EntityS 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 3.0

  • .NET Core 3 was announced on May 7, 2019, at Microsoft Build. Currently, preview builds are available.
  • An official release is planned for September 2019. With .NET Core 3 the framework will get support for the development of desktop application software, artificial intelligence/machine learning, and IoT apps.

New .NET core 3.0 features  

C# 8:

The .NET Core 3.0 supports C# 8, and the new features in C# 8.0 include Nullable reference types, Async streams, Ranges and indices, and Switch expressions.

Async streams:

A new asynchronous version of IEnumerable<T> is the IAsyncEnumerable<T>. If you want to consume the elements of IAsyncEnumerable<T>, then it lets you wait for each over it and use yield return that produces elements. With the ability to await for each, one can also create async iterators.

Switch Expressions:

It is the best way to switch statement but, yes, it is an expression that returns a value. They are fully integrated with pattern matching and represent the default value by using the discard pattern _.

Patterns allow you to write declarative code that captures your intent. The compiler is responsible for implying procedural code correctly.

Ranges and indices:

For indexing, the new index type can be used. Even user can create one from an int that counts from the start. It can count from the end as well but with a prefix ^ operator (C#).

Even the range type consists of two index value, one is for a start, and another one is for the end. It can be written as “x..y” range expression (C#). To produce a slice, one can then use the index with a range.

Using Declarations:

It is a new way to make sure that your object is properly disposed of, as it keeps the object alive even when it is still in scope. It automatically disposed of the object once it becomes out of scope. It will make your code cleaner and reduce nested using statements.

EEE Floating-point improvements:

With the IEEE 754-2008 revision, floating-point APIs are in the process of being updated to comply. It aims to expose all needed operations and make sure that they are behaviorally compliant with the IEEE spec.

Parsing and formatting fixes:

  • Correctly parse and format negative zero.
  • Correctly round inputs of any length and parse.
  • Correctly NaN by performing a case-insensitive check and parse Infinity and supporting an optional preceding + where applicable.

New Math APIs have:

  • BitIncrement/BitDecrement
  • MaxMagnitude/MinMagnitude
  • ILogB
  • ScaleB
  • Log2
  • FusedMultiplyAdd
  • CopySign

Windows desktop:

One can build Windows desktop apps using Windows Forms and WPF. With the .NET Core 3.0. It supports using modern controls and fluent styling from the Windows UI XAML Library (WinUI). It is a part of the Windows .NET Core 3.0 SDK.

Fast built-in JSON support:

The new built-in JSON support is low allocation, high-performance, and based on Span<byte>. To .NET Core 3.0, three new main JSON-related types have been added.

Tiered compilation:

It is on the .NET Core 3.0 as a by default that enables the runtime to more adaptively using the Just-In-Time (JIT) compiler to perform better.

Platform Support:

.NET Core 3.0 support on an extensive range of OS as given follows:

  • Windows Server: 2012 R2 SP1+
  • Windows Client: 7, 8.1, 10 (1607+)
  • RHEL: 6+
  • macOS: 10.12+
  • Ubuntu: 16.04+
  • Fedora: 26+
  • SLES: 12+
  • Debian: 9+
  • Alpine: 3.8+
  • openSUSE: 42.3+

Benefits of .NET core 3.0 for desktop

  • Enhancements in performance and other runtime updates that offer a better user experience.
  • Compatible with the .NET Core CLI tools and SDK-style projects in Visual Studio.
  • Allows seamless deployment of application-local and machine-global both.
  • Simple to use or test a new version of .NET Core for just one app on a machine.

Already available in the .NET Core 3.0 preview for developers to try out are features such as:


  • Windows desktop support with WPF and WinForms
  • Flexible deployment, side-by-side support, and self-contained EXE executable files
  • Client-side Web development with C# and Razor
  • Significant performance improvements
  • New C# language features for productivity and fewer errors

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One comment

  • Nice blog. It is nice to learn about the new features of .NET Core 3,0. The main feature is that of building desktop applications. The new .NET Core 3.0 version support C# 8 and will have all the features of the language. Thanks for sharing this useful information.

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