Stack Overflow
Stack Overflow

Questions tagged [.net-6.0]

For questions about Microsoft's .NET application development framework that are specific to version 6.0+ of the framework. Use only If your question are version-specific

For the original announcement of .NET 6, and for more detailed information, please refer to the official communication from Microsoft.

.NET 6 delivers the final parts of the .NET unification plan that started with .NET 5. .NET 6 unifies the SDK, base libraries, and runtime across mobile, desktop, IoT, and cloud apps.

is the next big release to the .NET family after .NET 5.

was released November 8th, 2021.

The first preview was made available on February 17th, 2021.

General Improvements :

In addition to this unification, the .NET 6 ecosystem offers:

  • LTS Release: .NET 6 is Supported for three years as the latest long term support (LTS) release.

  • Simplified development : Getting started is easy. New language features in C# 10 reduce the amount of code you need to write. And investments in the web stack and minimal APIs make it easy to quickly write smaller, faster microservices.

  • Better performance : .NET 6 is the fastest full stack web framework, which lowers compute costs if you're running in the cloud.

  • Ultimate productivity : .NET 6 and Visual Studio 2022 provide hot reload, new git tooling, intelligent code editing, robust diagnostics and testing tools, and better team collaboration.

Whats New :

  • C# 10 : All new C# 10 offers language improvements such as record structs, implicit using, and new lambda capabilities, while the compiler adds incremental source generators.

  • F# 6 : F# 6 adds new features including Task based async, pipeline debugging and numerous performance improvements.

  • Minimal APIs : Simplify getting started experience and HTTP services performance improvement.

  • Hot Reload : This feature enables you to skip rebuilding and restarting your app to view a new change — while your app is running — supported in Visual Studio 2022 and from the .NET CLI, for C# and Visual Basic.

  • .NET MAUI : .NET Multi-platform App UI (.NET MAUI) is still in preview, with a release candidate coming in the first quarter of 2022 and general availability (GA) in the second quarter of 2022. .NET MAUI makes it possible to build native client apps for desktop and mobile operating systems with a single codebase.

  • Blazor : ASP.NET Core in .NET 6 improves Blazor. Blazor components can now be rendered from JavaScript and integrated with existing JavaScript based apps.

  • File IO : File IO in .NET 6 has support for symbolic links and has greatly improved performance with a re-written-from-scratch FileStream.

  • Production stress-tested : Production stress-tested with Microsoft services, cloud apps run by other companies, and open source projects.

  • HTTP/3 : .NET 6 includes preview support for HTTP/3, a new version of HTTP. HTTP/3 solves some existing functional and performance challenges by using a new underlying connection protocol called QUIC. QUIC establishes connections more quickly, and connections are independent of the IP address, allowing mobile clients to roam between Wi-fi and cellular networks. For more information, see Use HTTP/3 with HttpClient.

Offical Links

5513 questions
236
votes
11 answers

ASP.NET Core 6 how to access Configuration during startup

In earlier versions, we had Startup.cs class and we get configuration object as follows in the Startup file. public class Startup { private readonly IHostEnvironment environment; private readonly IConfiguration config; public…
VivekDev
  • 20,868
  • 27
  • 132
  • 202
236
votes
14 answers

Non-nullable property must contain a non-null value when exiting constructor. Consider declaring the property as nullable

I have a simple class like this. public class Greeting { public string From { get; set; } public string To { get; set; } public string Message { get; set; } } Strangely I get the following warning. Severity Code Description…
VivekDev
  • 20,868
  • 27
  • 132
  • 202
180
votes
12 answers

Publish error: Found multiple publish output files with the same relative path

When I publish my ABP project I get the following error: C:\Program Files\dotnet\sdk\6.0.100-rc.1.21458.32\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.ConflictResolution.targets(112,5): error NETSDK1152: Found multiple publish output files with the…
Nader Gharibian Fard
  • 6,417
  • 4
  • 12
  • 22
153
votes
15 answers

How to use appsettings.json in Asp.net core 6 Program.cs file

I'm trying to access appsettings.json in my Asp.net core v6 application Program.cs file, but in this version of .Net the Startup class and Program class are merged together and the using and another statements are simplified and removed from…
Sajed
  • 1,797
  • 2
  • 7
  • 21
96
votes
8 answers

Equivalent to UserSettings / ApplicationSettings in WPF for newer .NET versions

What is the prefered way for persisting user settings for WPF applications with .net-5 , .net-6.0, .net-7.0 or .net-core>=3.0? Where are the .NET user settings gone? Created WPF .Net Core 3.0 Project (VS2019 V16.3.1) Now I have seen there is no…
MarkusEgle
  • 2,795
  • 4
  • 41
  • 61
90
votes
5 answers

error CS8773: "Feature 'global using directive' is not available in C# 9.0" after downgrade from net6.0 to net5.0

I have a project that was initially created for .NET 6 but then I needed to downgrade it to .NET 5. I changed Target framework in Project Properties and tried to compile. As a result I received a bunch of the errors: GlobalUsings.g.cs(2,1,2,29):…
Yuriy Gavrishov
  • 4,341
  • 2
  • 17
  • 29
89
votes
6 answers

Startup.cs class is missing in .NET 6

I created REST API's in .NET 5 and everything was working perfectly, but recently I moved to .NET 6 and realized that no startup.cs class is present. How do I add the DB Context in .NET 6 since there is no startup.cs?
Hernan Garcia
  • 909
  • 1
  • 3
  • 4
85
votes
4 answers

VS 2022 - Convert to file-scoped namespace in all files

I'm converting my project to .NET 6 and I want to use filescoped namespaces everywhere. But the conversion tool exists only in the editor. Has anyone found out if there's a way to run this editor function across all files in solution at once?…
Mirek
  • 4,013
  • 2
  • 32
  • 47
82
votes
4 answers

.NET 6.0 C# "new console template" - how to read CLI arguments?

Now that .NET 6.0 is out, what appears to have be a radical update to the default CLI project template is the absence of the familiar boilerplate being reduced to the following: // See https://aka.ms/new-console-template for more…
djtubig-malicex
  • 1,018
  • 1
  • 7
  • 11
77
votes
15 answers

Throwing ArgumentNullException

Suppose I have a method that takes an object of some kind as an argument. Now say that if this method is passed a null argument, it's a fatal error and an exception should be thrown. Is it worth it for me to code something like this (keeping in…
Jason Baker
  • 192,085
  • 135
  • 376
  • 510
76
votes
15 answers

Visual Studio 2019 Not Showing .NET 6 Framework

I've been struggling to change an ASP.NET Core Web API project's target framework to .NET 6 which was started using target framework .NET 5. I've already tried a few options but couldn't find the .NET 6 Framework listed in the target dropdown. I am…
Yasir Arafat
  • 938
  • 1
  • 6
  • 9
73
votes
14 answers

.NET6 and DateTime problem. Cannot write DateTime with Kind=UTC to PostgreSQL type 'timestamp without time zone'

I have common problem. Cannot write DateTime with Kind=UTC to PostgreSQL type 'timestamp without time zone' And I want to enable Legacy Timestamp behavoour as is documented…
mbrc
  • 3,523
  • 13
  • 40
  • 64
66
votes
25 answers

Assets file project.assets.json doesn't have a target for 'net6.0' - VS2022

Just a few days ago got this error, after updating to Visual Studio Community 2022 v17.2 (from v17.1.6): Error NETSDK1005 Assets file 'C:.........XXXXXX.Web\obj\project.assets.json' doesn't have a target for 'net6.0'. Ensure that restore has run and…
LLuz
  • 1,351
  • 1
  • 6
  • 8
63
votes
10 answers

Adding ADO.Net Entity Framework gives "The project's target framework does not contain Entity Framework runtime assemblies"

I've added a new .Net 6.0 project to my solution in VS2022. Installed the EntityFramework 6.4.4. with install-package entityframework and now try to add a ADO.Net Entity Framework Model to the project. I get an error: The project's target framework…
Paul Sinnema
  • 2,534
  • 2
  • 20
  • 33
59
votes
8 answers

Error NETSDK1045: The current .NET SDK does not support targeting .NET 6.0

I spent 2 hours trying to figure out what's wrong with my pipeline for Azure Functions .NET6 (on Windows). Error NETSDK1045: The current .NET SDK does not support targeting .NET 6.0. Either target .NET 5.0 or lower, or use a version of the .NET SDK…
johnykes
  • 1,663
  • 2
  • 9
  • 25
1
2 3
…
99 100