I built an ASP.NET Core application, but I have a hosting server which allows .NET 4.7.2 version only.
Is it possible to deploy to that environment?
As #marc_s already said that you cannot run .NET Core on .Net xxx
run time as two version has it's own runtime and they are different in
regards of its architecture.
If you have a .NET Core application, depending on its version, you could choose your runtime.
Here is the official release of all .NET Core versions:
Note
If you have any requirement where you need to communicate both .NET Core xxx version along with the Classic .NET xxx version, there is a way to build a bridge between them that is .NET Standard library.
The main goal behind .NET Standard was to establish greater uniformity in the .NET ecosystem. You can get more details in the official document here
Hope above explanation guided you accordingly.
I am developing an ASP.NET application and, for various reasons, I am using .NET 4.6.1 for this, with no option to upgrade to 4.7.1. From this web app I would like to call a DLL that has been compiled for 4.7.1. Is it possible?
No.Calling up higher versions in low versions is not possible
I have followings projects:
.NET Core 2.0 Web Application
.NET Standard 2.0 Class library &
.NET Framework 4.5 Class Library.
I add reference of .net framework class library to asp.net core web api project. and it seems it works very well.
I am wondering why it's possible to add reference of .NET Framework class library project to ASP.NET Core Web API or MVC?
It's not supposed to allow adding only Standard or Core libraries references to Core projects?
Is this core Web project with .NET Framework class libraries references still cross platform?
UPDATE
According to Phiter comment:
"If you import a .net framework library to your project it'll no longer be cross platform, but you can do it freely if you want to. They allow it because you might want to use .net core and still be on windows."
So if this is a reason, if I want to bind my project to .NET Framework and remain on windows why I use Core Web Project from the first place?
I thought we use core projects for cross platform ability and if not, the .Net framework is not a better option?
UPDATE
mason comment:
"Nothing funny: ASP.NET Core project doesn't have to run on .NET Core. It can also be run on .NET Framework.
Just because it's called 'Core' doesn't mean they're related. They could have called it ASP.NET FancyPants and had it run on .NET Core and .NET Framework and you wouldn't be as confused. Microsoft just sucks at naming things."
UPDATE (November 12, 2018)
A first look at changes coming in ASP.NET Core 3.0 - Fully leveraging .NET Core
As announced on the .NET Blog earlier this month, .NET Framework will get fewer of the newer platform and language features that come to .NET Core moving forward, due to the in-place update nature of .NET Framework and the desire to limit changes there that might break existing applications. To ensure ASP.NET Core can fully leverage the improvements coming to .NET Core moving forward, ASP.NET Core will only run on .NET Core starting from 3.0. Moving forward, you can simply think of ASP.NET Core as being part of .NET Core.
Customers utilizing ASP.NET Core on .NET Framework today can continue to do so in a fully supported fashion using the 2.1 LTS release. Support and servicing for 2.1 will continue until at least August 21, 2021 (3 years after its declaration as an LTS release) in accordance with the .NET Core support policy.
This was just added as part of .NET Standard/Core 2.0. As long as the .NET Framework dll only references things in the .NET Standard, it will use type forwarding to the .NET Core implementations.
I do not know what made Microsoft allow referencing .net framework class library into .net core project but as a programmer, I am happy with this allowance.
You see allowing .net core application to reference .net framework libraries is useful in case you want to start with windows and are planning to go cross platform in the future.
We are in a stage where many useful open source libraries do not fully support .net core till the date of this post, masstransit is an example, so when I am developing a new software I will be using .net core project that depends on such libraries and I will update them later when they support .net core.
I can find similar questions, but those answer is not clear or no answer (all answered now) that make me confuse .
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Now Visual Studio has 3 Web Project template :
ASP.NET Web Application (.NET Framework) <-- old
ASP.NET Core Web Application (.NET Core) <-- new
ASP.NET Core Web Application (.NET Framework) <-- new
I know the different between .NET Core and .NET Framework.
.Net Core - can cross platform(Windows, OS X, Linux)
.NET Framework - Windows Only
Then, the problem:
If we can use .Net Core in cross platform include Windows,
Why there still need ASP.NET Core Web Application(.NET Framework)(new) ?
If only work on Windows ,
Why don't just use ASP.NET Web Application (.NET Framework)(old)? which much mature and more support.
What is the purpose/usage of ASP.NET Core Web Application (.NET Framework)(new)??
.NET Core does not have all the APIs available in .NET Framework. As a result when running on Windows you may want to target full .NET Framework instead of .NET Core in your Asp.NET Core application.
Asp.NET 4.x is still supported and it's perfectly fine to create new applications using Asp.NET 4.x.
However, the vast majority of innovation goes to Asp.NET Core. Asp.NET Core is also open source so you can actually see the code you are running, debug the code you are running and even contribute back your fixes or new features. Finally, Asp.NET Core is also much more lightweight (everything is a NuGet package and you only include what you need, not coupled to IIS - runs out-of-proces when using IIS) and much faster than ASP.NET.
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I'm confused on the distinction between these terms:
ASP.NET 5 (now renamed ASP.NET Core and released as 1.0, not 5.0)
ASP.NET Core 5
.NET Core
Can anyone briefly explain it?
ASP.NET 5 (now ASP.NET Core 1.0)
Is the next generation of ASP.NET that provides a familiar and modern framework for web and cloud scenarios. It includes the next versions of ASP.NET MVC, Web API, Web Pages and SignalR. It is a high-performance and modular design, and supports full side by side to make it seamless to migrate from on premise to the cloud. These products are actively developed by the ASP.NET team in collaboration with a community of open source developers. Together we are dedicated to creating the best possible platform for web development.
Update: It has been renamed from ASP.NET 5 to ASP.Net Core 1.0.
.NET Core:
.NET Core is the small optimized runtime that is the basis of ASP.NET Core. It currently runs on Windows, Linux, and Mac. It is a high-performance and modular design, and supports having several applications on a web server each one with its own copy of the .NET Core runtime, enabling a full side by side experience, and that will make it easy to adopt new .NET Core versions without affecting other apps, and this makes .NET Core architecture a leap forward from the current classic .NET 4.6. These products are actively developed by the .NET team and in collaboration with a community of open source developers. Together we are dedicated to improving and extending the .NET platform with new features and for new scenarios.
.NET Core has two major components. It includes a small runtime that is built from the same codebase as the .NET Framework CLR. The .NET Core runtime includes the same GC and JIT (RyuJIT), but doesn’t include features like Application Domains or Code Access Security. The runtime is delivered on NuGet, via the Microsoft.CoreCLR package.
.NET Core also includes the base class libraries. These libraries are largely the same code as the .NET Framework class libraries, but have been factored (removal of dependencies) to enable us to ship a smaller set of libraries. These libraries are shipped as System.* NuGet packages on NuGet.org.
For more information, see Introducing .NET Core
ASP.NET 5 is a new platform based on DNX (.NET Execution Environment). DNX is on duty for loading CLR. There're two kind of DNX now: for Full .NET CLR (from .NET Framework) and for CoreCLR. CoreCLR is a new cross-platform light CLR (runs on Win/Linux/Mac).
ASP.NET 5 works seamlessly on CLR/CoreCLR as DNX abstracts it from runtime being used.
IL assemblies build for old .NET still be used with new CoreCLR and DNX. So ASP.NET 5 functionality is a bunch of nuget packages.
Strictly speaking there're no such things as "asp.net core 5" and ".net core" now (as CLR != .NET). There's "ASP.NET 5 running on CoreCLR".
IMO it's better to consider "ASP.NET 5" as ".NET 5".
There is no ASP.net Core 5 yet. In fact, Microsoft decided to change the .net 5 (The version after 4.6) to a brand new name : .net Core
So the version released on June 2016 is actually .net Core 1.0
The reason why they gave it a new name is the very fundamental change they've made in it.
These fundamental changes include :
Cross platform: It works on Windows/Linux/Mac as opposed to the previous versions working only on Windows/IIS
It's fully open source now and you can see every bit of its code in GitHub.
Its performance (especially in ASP.net) is way better than the previous versions, as you can easily customize your request pipeline according to what you need (through middlewares).If you are familiar with nodejs and ExpressJs framework it's so similar to ExpressJs. In some cases it performs better than NodeJs. Have a look into this benchmark.
It's designed with a modern mindset of app development, for highly distributed cloud applications, microservices and containers (docker)
ASP.NET Core is the next version of ASP.NET MVC 5, Yes, the version number is confusing! It has gone through a few name changes. It started as ASP.NET vNext, then changed to ASP.NET 5, next was renamed to ASP.NET MVC 6 and eventually became ASP.NET Core 1.0.
The main difference between ASP.NET and ASP.NET Core are
Platform Independent Features, ASP.NET Core provides hosting in multiple platform (Win / Linux / Mac OS) hosting (Cross platform).
Introduced new lighter version of CLR and assemblies with non-dependent frameworks.
Frameworks are a complete rewrite (removal of dependencies with DI) and Its Open source Project.
Project default project template is updated with Type scripts insted of JQuery.
Improved new security features and completely decoupling for all its dependent framework.
Updated project template with angular and json based configuration & enhanced packages support with node modules.
Supports for Visual Studio IDE ( 2015 v3 + 2017 and above) & VS Code IDE.
If you are new to this, Please refer Here
By the way there is also a Mono runtime as an alternative to CoreCLR in the linux apt and Docker package. Mono is still the default when it's up to installing DNX. The whole thing about the "Core" is that it's a cross platform .net framework and at some point hosting an ASP.NET 5 app will not make use of IIS, Apache, Mono etc., but the DNX and Libuv.
.NET Core 1.0 is not the next version of .NET 4.6.2 (Full .NET Framework). If it is the next version it should have more features than the previous version. But according to Microsoft .NET Core 1.0 doesn't have some of the features .NET 4.6 got. That's why they named it as .NET Core 1.0 instead of .NET 5.
In ASP.NET Core 1.0 they are using .NET Core 1.0 as reference. That means we don't need to install .NET framework to run our ASP.NET Core 1.0 application.
You can find more updated information here.
ASP.NET Core i.e 1.0/2.0...
ASP.NET Core is an open-source, cross-platform framework for building modern, cloud-based web apps on Windows, macOS, or Linux.
ASP.NET i.e ...4.5/4.6
ASP.NET is a mature framework that provides all the services needed to build enterprise-grade, server-based web apps on Windows.
There is no such thing as ASP.NET Core 5 and .NET Core.
ASP.NET 5 is same as ASP.NET Core 1.0
Please refer to the link:
https://learn.microsoft.com/en-us/aspnet/core/choose-aspnet-framework?view=aspnetcore-2.0