Using iText 7, we can define two passwords: a user password and an owner password. A pdf that is encrypted with an owner password can be opened by every one who receives the document. The owner password is there to define permissions (for instance: the document can be viewed, but not printed). If a pdf is encrypted using a user password, everybody who knows the user password can open the file. There is no username, only a user password.

In this article, we will discuss how to create a Custom Authentication Filter in ASP.Net MVC application. The Authentication Filter was introduced with MVC 5 and provides a great enhancement for authenticating an endpoint.

When consuming a REST API, understanding its various methods can be challenging for a developer. Swagger, also known as OpenAPI, solves the problem of generating useful documentation which allows us to obtain a good quality of documentation with a minimal time cost. Also, it gives benefits such as interactive documentation, client SDK generation, and API discoverability. The .NET Core implementation Swashbuckle is very easy to use Swagger by adding a couple of NuGet packages and modifying the Startup.cs.

Dependency Injection (DI) is a software design pattern that is a technique for achieving Inversion of Control (IoC) between classes and their dependencies. According to IoC, the direction of dependency within the application should be in the direction of abstraction, not implementation details. Dependency Injection (DI) makes loosely coupled application that provides greater maintainability, test-ability and also re-usability. ASP.NET Core has built-in support for dependency injection (DI).

API Versioning is very important and it should be implemented in every API application. In this artilcle, we will use different availeble options for versioning in .NET Core API Application.

A Countdown Timer is used to show how much time left from an event. Say we have an event which is going to start after two days. A Countdown Timer will display a counter saying days , hours , minutes and seconds left for the event to happen or the campaign to end. Earlier, I had written a blog on this with single event but now I'm exploring it with multiple events in single page.

If your application using ASP.NET Core 2.0 API and hosted to an Azure App Service, then you might run into an issue where it takes a process request longer than two minutes to complete. You’ll typically get a 502 Bad Gateway error from IIS server and you need to increase request timeout.

According to Microsoft's announcement, .NET Core 3.0 is a major update which adds support for building Windows desktop applications using Windows Presentation Foundation (WPF), Windows Forms, and Entity Framework 6 (EF6). ASP.NET Core 3.0 enables client-side development with Razor Components. It will support for Azure Cosmos DB (EF Core 3.0), C# 8 and .NET Standard 2.1 and much more! Developer can develop .NET Core 3 applications with Visual Studio 2019 Preview 1, and Visual Studio Code. It will be supported in a later version of Visual Studio for Mac.

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WAP to Print the Double Pyramid Pattern