Most code can probably skip. So, what should you do? My expectation is that widely used libraries will end up multi-targeting for both. NET 5: supporting. NET 5 ensures you can leverage the latest platform features for customers that are already on.
In a couple of years, the choice for reusable libraries will only involve the version number of netX. Y , which is basically how building libraries for. NET has always worked — you generally want to support some older version in order to ensure you get the most reach.
NET Standard has made it much easier to create libraries that work on all. NET platforms. But there are still three problems with. NET Standard:. NET Standard was designed at a time where the. This made writing code that needs to work in different environments hard, because different workloads used different. NET implementations. The goal of. NET Standard was to unify the feature set of the base class library BCL , so that you can write a single library that can run everywhere.
And this has served us well:. And if we look at all packages on NuGet. But standardizing the API set alone creates a tax. NET open-source community which includes the. So, in the general sense, innovation in the BCL requires shipping a new version of.
Up until. But in. NET implementations have to support, so there is an editorial aspect to it in that all APIs must be reviewed by the. NET Standard review board. The board is comprised of. NET platform implementers as well as representatives of the. NET community. The goal is to only standardize APIs that we can truly implement in all current and future.
These reviews are necessary because there are different implementations of the. NET stack, with different constraints. We predicted this type of friction, which is why we said early on that. NET implementation. This seems reasonable at first, but then you realize that. NET Standard is widely supported. Doing this for all features was simply too expensive, which is why quite a few of them still missed the. But what if there was a single code base? And what if that code base would have to support all the aspects that make.
When a feature is implemented, it would already be available for everyone because the code base is shared. It also means that we need to map. NET Standard versions to their implementations. We have unified the. NET platforms by adding yet another synthetic platform below them all that represents the common API set.
In a very real sense, this XKCD-inspired comic is spot on:. NET 5 does: it provides a unified implementation where all parties build on the same foundation and thus get the same API shape and version number. When we designed. NET Standard, we had to make pragmatic concessions in order to avoid breaking the library ecosystem too much. Moving forward, we will avoid adding platform-specific APIs to net5. For example, with Blazor WebAssembly we have recently added a new environment where.
Starting with. This feature replaces the Microsoft. Compatibility NuGet package. When you create a project targeting net5. Registry package. Guard the call.
Mark the call as Windows-specific. In some cases, it might make sense to mark the calling member as platform-specific via [SupportedOSPlatform "windows" ]. Delete the code. For example, instead of using the registry, you could use an XML configuration file. Suppress the warning. You can of course cheat and simply suppress the warning, either via. However, you should prefer options 1 and 2 when using platform-specific APIs.
To guard the call , use the new static methods on the System. OperatingSystem class, for example:. The key difference is that in the second example the analyzer will now issue warnings for the call sites of GetLoggingDirectory because it is now considered to be a Windows-specific API. In other words, you forward the requirement of doing the platform check to your callers.
The [SupportedOSPlatform] attribute can be applied to the member, type, or assembly level. This attribute is also used by the BCL itself. For example, the assembly Microsoft. Registry has this attribute applied, which is how the analyzer knows that the registry is a Windows-specific API in the first place. Note that if you target net5. That means using Windows-specific APIs from net5. Since the browser sandbox is fairly restrictive, not all class libraries and NuGet packages should be expected to work in Blazor WebAssembly.
NET 5 and subsequent versions will be a single code base that supports desktop apps, mobile apps, cloud services, websites, and whatever environment. NET will run on tomorrow. NET Framework of being light on threading support. And yet, I will accuse previous versions of the. NET Framework as being light on the real support developers everywhere need to successfully build scalable and highly parallelized applications. NET Framework versions. Some may question the value of a rich subsystem in a managed language for writing parallel code.
After all, parallelism and concurrency are about performance, and developers interested in performance should seek out native languages that provide pedal-to-the-metal access to the hardware and full control over every bit twiddle, cache line manipulation and interlocked operation … right? I fear for the state of our industry if that is indeed the case.
Managed languages like C , Visual Basic and F exist to provide all developers—mere mortals and superheroes alike—with a safe, productive environment in which to rapidly develop powerful and efficient code. All of this is to say that managed languages and their associated frameworks have deep-seated support for building high-performing concurrent applications, so that developers on modern hardware can have their cake and eat it too.
Consider a typical for loop:. We can use threads directly to effect the parallelization of this loop, as shown in Figure 1. Of course, there are a myriad of problems with this parallelization approach. Arguably worst of all, however, is that the developer is forced to write this code in the first place.
The problem exemplified by the previous code is further amplified when we recognize that parallel loops are just one pattern in the multitudes that exist in parallel programs. Forcing developers to express all such parallel patterns at this low level of coding does not make for a good programming model, and does not set up for success the masses of developers in the world who need to be able to utilize massively parallel hardware.
Enter the. NET Framework 4. This release of the. NET Framework was augmented with a multitude of features to make it significantly easier for developers to express parallelism in their applications, and to have that parallelism executed efficiently. The System. Threading namespace was enhanced in the. NET Framework 4 with a new sub namespace: System. This namespace includes a new type, Parallel, that exposes an abundance of static methods for implementing parallel loops and structured fork-join patterns.
As an example of its usage, consider the previous for loop:. Here, the developer is still responsible for ensuring each iteration of the loop is in fact independent, but beyond that, the Parallel.
It handles dynamically partitioning the input range across all underlying threads involved in the computation, while still minimizing overhead for partitioning close to those provided by static partitioning implementations. It handles scaling up and scaling down the number of threads involved in the computation dynamically in order to find the optimal number of threads for a given workload which is not always equal to the number of hardware threads, contrary to popular belief.
Most importantly, it keeps the developer from having to think about parallelism at the lower-level OS abstraction of threads, and from needing to continually code delicate solutions for partitioning workloads, offloading to multiple cores and joining the results efficiently. This customization capability highlights one of the goals of this parallelization effort within the.
NET Framework: To make it significantly easier for developers to take advantage of parallelism without complicating the programming, but at the same time give more advanced developers the knobs they need to fine-tune the processing and execution.
NET learning has a good future, you should not be worried. NET is one of the popular and most used frameworks in IT industry. Most of the fortune companies use. NET to build their software.
The current version of. NET is. C is the preferred programming language of C. Other programming languages are used in. NET is kind of fading away now. Key features of. NET are:. NET is open source. NET is unified. NET is a full stack development platform. NET is modern. NET is fast. NET is evolving. NET has a large community support behind it. NET has a clear path of upgrades and releases If you're interested in learning. NET now, Blazor is the technology you may want to focus on for building web applications.
Check out Blazor here: Getting Started with Blazor Cloud native applications is another growing area. Cloud native apps are developed and deployed in Azure cloud and use cloud capabilities to full extent. Since then C and. NET has come a long way. NET Framework was introduced in and 19 years later, here we are. In , Microsoft shifted its focus and open sourced a new version of. NET, and named it. NET Core. NET Core is managed and run by Microsoft and the open source community.
Currently, there are two versions of. NET NET Framework and. Going forward, there is going to be only one version of. NET and that is,. NET 5 takes the best of. NET Core , we would recommend Blazor which provides the closes t programming model. If you are a re moting or WCF Server developer and want to build a new application on. If you are a Windows Workflow developer there is an open source port of Workflow to.
With the. NET applications should be based on. The primary a pplication types from. NET Framework are supported, and where we did not port something over there is a recommended modern replacement. All future investment in. NET will be in. NET Framework 4. If you have existing. NET Framework applications that you are maintaining, there is no need to move these applications to. We will continue to both service and support.
NET Framework , which includes bug — , reliability — and security fixes. It will continue to ship with Windows much of Windows depends on.
NET Framework and we will continue to improve the tooling support for. N ew applications should be built o n. NET Cor e. NET Core is where future investments in. NET will happen. Existing application s are safe to remain on. NET Framework which will be supported. Existing applications that want to take advantage of the new features in. NET should consider moving to.
As we plan into the future, we will be bringing in even more capabilities to the platform. You can read about our plans here. Comments are closed.
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