What’s new in C# 14.0

ByMarius Bughiu December 1, 2024April 11, 2025

C# 14.0 will be released later this year, in November, at the same time as .NET 10. See here what’s new in the .NET 10 runtime, including performance benchmarks.

There are several new features and improvements in C# 14:

the field keyword
implicit span conversions
nameof support for unbound generic types
simplified parameters with modifiers in lambdas
partial constructors and events events
Extension members, extension keyword
null-conditional assignment

C# 14.0 is currently in preview:

Preview 1 (25 Feb 2025)
Preview 2 (18 Mar 2025)
Preview 3 (10 Apr 2025)

.NET | .NET 8

C# – How to shuffle an array?

ByMarius Bughiu October 26, 2023November 1, 2023

The easiest way to shuffle an array in C# is using Random.Shuffle. This method has been introduced in .NET 8 and works both with arrays and spans. The suffling is done in-place (the existing array/span is modified, as opposed to creating a new one and leaving the source unchanged). In terms of signatures, we’ve got:…

C# 11 – Raw string literals

ByMarius Bughiu March 15, 2023November 5, 2023

Raw string literals are a new format which enables you to include whitespace, new lines, embedded quotes, and other special characters in your string, without requiring escape sequences. How does it work: A quick example: This will output the following: Whitespace before the closing sequence The whitespace before the closing double-quotes controls the whitespace which…

.NET | C#

C# How to wait for a process to end?

ByMarius Bughiu August 11, 2023November 5, 2023

You can use the WaitForExit method to wait for the process to complete. Your code will wait synchronously for the process to finish, then it will resume execution. Let’s look at an example: The code above will start a new cmd.exe process, and execute the timeout 5 command. The process.WaitForExit() call will force your program…

.NET | .NET 8 | C#

The type or namespace name InterceptsLocationAttribute could not be found

ByMarius Bughiu September 14, 2023November 5, 2023

If you’re just getting started with interceptors, you might be getting one of the following errors: Error CS0246 The type or namespace name ‘InterceptsLocationAttribute’ could not be found (are you missing a using directive or an assembly reference?) Error CS0246 The type or namespace name ‘InterceptsLocation’ could not be found (are you missing a using…

The command for generating a new dotnet project with aot enabled: dotnet new api --aot

.NET

dotnet new api -aot: ‘-aot’ is not a valid option

ByMarius Bughiu June 14, 2023November 5, 2023

The correct syntax for generating a project with AOT is –aot (with 2 hyphens). In this particular case, the correct command would be:

.NET | C#

C# 12 – Interceptors

ByMarius Bughiu October 12, 2023November 5, 2023

Interceptors are an experimental compiler feature introduced in .NET 8, meaning it may change or be removed in a future release of the framework. To see what else is new in .NET 8, check out our What’s new in .NET 8 page. To enable the feature, you’ll need to turn on a feature flag by…