.NET Core 3.0 Preview Now Available!

.NET Core 3.0 Preview Now Available!

.NET Core 3.0 Preview 3 is out and there are many interesting updates to the framework and to ASP.NET Core.

Microsoft has released previews for the updates to its two most popular frameworks. An expert developer goes over all the changes you need to know.

Here’s a list of the most important updates. Downloads are available here.

Updates to .NET Core 3.0:

  • More support for Indexes and Ranges in C#
  • .NET Standard 2.1 support. To target the .NET Standard edit project file and specify netstandard2.1 as the target framework. .NET Standard 2.1 is not supported by the full .NET Framework.
  • F# 4.6 and dotnet fsi command. Previews of F# 4.6 and the dotnet fsi command are available. FSI stands for F# interactive.
  • AssemblyDependencyResolver and resolver events. Loading dependent assemblies from a given path (wasn’t possible before), resolver events help us work better with dynamically loaded native dependencies.
  • High DPI for Windows Forms Applications. Finally, Microsoft pushes Windows Forms applications to the current era. 96DPI is not constant anymore and it’s possible to build high-DP Windows Forms apps.

Updates to ASP.NET Core 3.0:

  • Improvements to Razor Components. There’s a single project template now, Razor components support endpoint routing and prerendering, and Razor components can be hosted in Razor class libraries. There’s also improved event handling and support for forms and validation.
  • Runtime compilation. It was disabled in ASP.NET Core 3.0 templates but it can be turned on now by adding a special NuGet package to the project.
  • Worker Service template. Need to write a Windows service or Linux daemon? Now we have a worker service template for this.
  • gRPC template. Together with Google, Microsoft is building a gRPC that is popular with the Remote Procedure Call (RPC) framework. This release of ASP.NET Core introduces the first bits of gRPC support on ASP.NET Core.
  • The Angular template is using Angular 7. The Angular SPA template uses now Angular 7 and before the first stable release it will be replaced with Angular 8.
  • Authentication for SPAs. Microsoft added out-of-the-box authentication support for single-page applications with this preview.
  • SignalR integration with endpoint routing. Small change - SingalR routes are now defined with endpoint routing.
  • SignalR Java client support for long polling. The SignalR Java client can be used now even in environments where WebSocket is not supported or allowed.

There’s not much news about Entity Framework Core 3.0 but we can expect updates with next preview version of .NET Core.

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Originally published by Gunnar Peipman at https://dzone.com

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The Life-Cycle of an ASP.NET Application In Web Development

If you are a beginner in ASP.NET, You Should understand the life-cycle of an ASP.NET Application In web development.

Whenever a user tries to access a particular page or when a page is requested by the user from the browser, the request goes through a series of steps and numerous processes run under the hood in the background, in order to produce the output or send the response back to the client. 

The time period and the processes that run between the request and response of a page is called the "Page Life Cycle".

Request:- Start of the life cycle (sent by the user).

Response:- End of the life cycle (sent by the server).

The application life cycle has the following stages to put them into brief:-

  • User makes a request for accessing application resource, a page. Browser sends this request to the web server.
  • A unified pipeline receives the first request and the following events take place:
  • An object of the class ApplicationManager is created.
  • An object of the class HostingEnvironment is created to provide information regarding the resources.
  • Top level items in the application are compiled.
  • Response objects are created. The application objects such as HttpContext, HttpRequest and HttpResponse are created and initialized.
  • An instance of the HttpApplication object is created and assigned to the request.
  • The request is processed by the HttpApplication

The life-cycle of an ASP.NET page

Whenever someone requests a page, it gets loaded into the server memory, processed, and sent back to the browser. It then gets unloaded from the memory. During each of these steps, methods and events are available, and there is a chance that it could be overridden according to the needs of the application. At the same time, one can write their own code to override the default code.

The Page class engineers a hierarchical tree of all the controls on the page. Every single component on the page, except the directives, becomes a part of this control tree. You can see the control tree by adding trace= "true" to the page directive.

What are the events that occur in ASP.NET page life-cycle

During each stage of the page life cycle, the page raises some events, which could be coded. Talking about event handler, it is a function or subroutine, bound to the event, using declarative attributes such as Onclick or handle.

PreInit - This is the first event in the page life cycle. It checks the IsPostBack property and establishes whether the page is a postback. It helps in setting up the themes and master pages, creates dynamic controls, and gets and sets profile property values. This particular event can be handled by overloading the OnPreInit method or creating a Page_PreInit handler.

Init - Init event kickstarts the control property and the control tree gets built. The event can be handled by overloading the OnInit method or creating a Page_Init handler.

InitComplete - InitComplete event enables tracking of view state. Each and every controls turn on view-state tracking.

LoadViewState - LoadViewState event allows loading view state information straight into the controls.

LoadPostData - At the time of this phase, the contents of all the input fields are defined with the <form> tag are processed.

PreLoad - The PreLoad event unfolds right before the postback data is loaded in the controls. This event can easily be handled by overloading the OnPreLoad method or creating a Page_PreLoad handler.

Load - This event is raised for the page first and after that, recursively for all the child controls. The controls in the control tree are created. One can handle this event by overloading the OnLoad method or creating a Page_Load handler.


ASP.NET has a long lasting future. Most of the web development today is done on ASP.NET pages. Today you can easily hire ASP.NET developers and start building your dream website today.

DevOps For ASP.NET Developers

DevOps is the union of people, process, and products to enable continuous delivery of value to our end users. Azure DevOps is everything you need to turn an idea into a working piece of software.

Abel and Jeremy introduce us the benefits of DevOps. They give us a high level overview of how to implement some DevOps best practices using Azure DevOps.

Abel and Jeremy explain the difference between these two options and show how we can get started with Azure Repos. They will walk us through creating branches, adding policies, and also integrating with GitHub.

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