In the full pace of open source, Microsoft is also gradually catching up with the pace, as one of Microsoft’s earliest important software towards open source, the release of.net 5 is of great significance to Microsoft and its users.

Microsoft’s future goal is to integrate all.NET components into one product so that users can then use parts of.NET on demand, rather than download or install everything individually.

For Visual Studio users, Visual Studio 16.8 or higher is required to be available on Windows. NET 5.0, using the latest version of Visual Studio for Mac on MacOS). C# extensions for Visual Studio Code are also supported. NET5.0 and c # 9.

.net is 5.0. The first version of the.net unification Journey. Microsoft expects.NET Framework developers to migrate their code and applications to.NET 5.0, paving the way for the transition of Xamarin developers to a unified platform when.NET 6.0 is released next year.

Release timeline:

.NET Core 3.0 was launched in 2019/09

.NET Core 3.1 has been released as LTS (Long Term Support) since December 2019. NET Core will change its name. NET, the fixed release of new edition every year, and define the even-numbered version as LTS version, singular version as Current version.

The.net 5.0 2020/11

The.net 6.0 LTS 2021/11

The.net 7.0 2022/11

The.net 8.0 LTS 2023/11

If you are interested, you can experience, has published data and address: dotnet.microsoft.com/download/do…

.net is 5.0. The.net Framework and. NET Core is a combination of Core, aimed at unity. The.net platform. .NET 5.0 undoubtedly stands for. NET future, but the majority of domestic enterprises are still using. NET Framework, but in the long term, an upgrade seems inevitable.

To fully demonstrate the performance of.net 5, Microsoft has implemented extensive internal deployments since the first preview release, in addition to running on.NET 5.0. In addition to.net, Bing is using the new platform.

The update highlights some notable changes, including some performance improvements.

Here are some of the highlights from Microsoft’s release:

1.. NET 5.0 has been deployed to dot.net and hosted at Bing.com for several months and is already battle-tested.

2. The performance of many components has been greatly improved. .NET 5.0 has improved ARM64 performance and GRPC etc

3.C# 9 and F# 5 offer new language improvements such as top-level programs and logging in C# 9, while F# 5 offers interactive programming and. NET functional programming performance improvements.

4.. The NET library has improved performance for Json serialization, regular expressions, and HTTP (HTTP 1.1, HTTP/2). They are now also fully annotated as nullability.

5. P95 latency has decreased due to improvements in GC, hierarchical compilation, etc.

6. Better application deployment options with ClickOnce client application distribution, single file application, container image size reduction, and addition of Server Core container image.

7. Expanded platform range with the addition of WindowsArm64 and WebAssembly.

8. One notable change is that.NET 5.0 applications can run natively on ARM64 Windows devices, eliminating some of the performance hurdles associated with emulation. However, in this release, Windows desktop components are not available for ARM64 devices – this is planned in. NET 5.0 service update.

The open source projects for.net Core have also been very active in recent years and will be integrated into.net5 and beyond with the release of.net5.

But there are a few points to note:

The current.NET5 is strong enough, but strictly still in the implementation phase, and.NET6.0 may be more to look forward to.

Many of the current updates to.net5 have not been discussed in practice, such as regular performance improvements, static regular caching; Kestrel communication performance improvements, support for Http3; Certificate transfer enhances SSL communication; Readonly struct used internally; HttpClient user-friendly Api, support WebAssembly, support serialization results, support Quic, etc.; Json supports field serialization, read-only serialization, Web serialization, and circular reference serialization. GC allocates no zero memory space, allocates “fixed” heap space, GCMemoryInfo, and so on.

If there is no urgent need, upgrading to 5.0 is not recommended at this time. Use 5.0 as a research springboard and consider upgrading when Microsoft releases 6.0LTS long-term maintenance next year to reduce the risk. Of course, this needs to be evaluated according to the actual situation.

.

Next, put one. NET Core3.1 upgrade. NET5 may encounter a pit for reference, do not need to skip this section, author of dotnet cross-platform.

Scott Hunter made a statement on his blog. NET Core3.1 smooth migration. NET5, so I went to upgrade my treasure project on the same day, the result is that there is no pit, small pit constantly, toss and toss for a day to get it done, the following carefully carefully, to provide some reference for the construction.

background

The upgraded project was previously open source on Github, and 300star was added in a week. Although it was closed later for some reason, I personally made great efforts. This is not.NET5 just released, the first time began to upgrade.

The project is a wechat small program mall. The back end is supported by micro-service architecture. Ocelot Gateway +Consul service registration discovery +Core WebApi+gRPC+IdentityServer4 have been arranged. MongoDB, Redis, RabbitMQ are also arranged, and then in. NET Core3.1 upgrade. NET5 process various trample pits.

VS upgrade pit

The first pit in the upgrade comes from the VS tool upgrade! Visual Studio 2019 Preview (RC1, RC2, NET5) Update Visual Studio 2019 to V16.8. The Installer is not connected to the network and cannot download. Of course, it was not my network problem, in fact, there was a problem with DNS resolution (some users will encounter it, and the solution is to set the DNS on the computer to 8.8.8.8), but after all, it was the early morning of 11th, and I thought that the official synchronization of Microsoft was not enough, so I chose to change tools and directly went to Linux to upgrade with VS Code. Then the second wave of environmental pits began!

Lesson: If Visual Studio Installer displays a message indicating that the network is not connected and cannot be downloaded, set the DNS to 8.8.8.8

Linux environment pit

I was familiar with VS Code development in Linux, so I thought it was an upgrade. NET5, the Linux system from CentOS7 to CentOS8, and then all kinds of beautiful pits. For example, in CentOS8, the name of the nic is changed from ENS33 to eth0, and iptables is replaced by nftables. Various small changes make it difficult to prevent, and then the commands of the latest version of Docker are also slightly changed from the previous version, which leads to various malfunctions of Linux+Docker operation notes. Back and forth for hours.

Of course, the environment is just the environment, over and over again, and the code migration level of the pit is the most troublesome, because do not know how much has not been found!

.net5 Migration pits pits

The project was upgraded from.net Core3.1 to. NET5 is very easy, upgrade the SDK version from 3.1 to 5.0 in global.json, and change the TargetFramework from netcoreapp3.1 to net5.0. There are also some library namespace changes that are completely irrelevant, which are easily resolved by the intelligent hints of the first IDE in the universe. However, during the migration of real projects, I ran into various minor issues:

1. The Core WebApi framework template project integrates Swagger by default. This is new, but the previous project had some custom configurations and extensions, which also caused conflicts.

2.IdentityServer4 third-party framework version upgrade, API changes are quite a bit, not a lot of code changes, although this is not the case. NET5, but also upgrade projects will encounter.

3. It took some time to try C#9, trying to experience the new syntax and features, such as Native ints and Pattern matching improvements, but ended up getting involved several times.

In ASP.NET Core 3.1 and earlier versions, DateTime is bound to the local time of the server. After 5.0, DateTime is bound to UTCTime.

Learun.net