asp net C# filestream, file cannot be accessed because it is being used by another process

The ASP.NET framework extends the .NET developer platform specifically for building web-based applications. It supports web technologies such as REST APIS, HTML, CSS, and JavaScript. It provides a built-in user database with multi-factor and external authentication. ASP.NET supports industry-standard authentication protocols with a built-in security mechanism to protect your .NET apps from cyberattacks. It used to be that developers had to buy expensive software (called Integrated Development Environments, or IDEs) in order to build applications.

what is used for

Developers use .NET programming languages and application model frameworks to create their .NET applications. ASP.NET is a server-side technology used for developing dynamic websites and web applications. ASP.NET aids developers to create web applications by using HTML, CSS, and JavaScript. Matt has over 15 years of web development and agency management experience.

What are the components of .NET architecture?

But it’s hard to say that this is a pattern you should be using these days, even in a “toy” application, when there are other (better) options available. ASP.NET is written using Object Oriented Programming languages such as C# or Object Oriented Programming provides a framework and patterns for code organization and reuse. There are also some other technology like Java, PHP, Perl, Ruby on Rails, etc. which can be used to develop web applications. The web applications which are developed using the .NET framework or its subsets required to execute under the Microsoft Internet Information Services(IIS) on the server side. The work of IIS is to provide the web application’s generated HTML code result to the client browser which initiates the request as shown in the below diagram.

Most ASP.NET applications use Microsoft IIS (Internet Information Server). IIS is available for all versions of Microsoft Windows at no additional cost. Windows hosting servers are usually more expensive than comparable Linux servers, which are commonly used to run PHP, JavaScript and Ruby applications. However, with the release of ASP.NET Core in 2016, ASP.NET applications are no longer reliant on IIS and can now be hosted on Linux and MacOS as well as Windows.

ASP.NET Architecture and its Components

Open the appsettings.json file and configure your MySQL connection. It’s worth noting that as the endpoints use the standard ASP.NET Core Identity managers and stores, anything you can implement at that layer, should work without any issues. For example you can customise the password requirements to update the IdentityOptions and that will all flow through to your endpoints. The good news is you can “just” reimplement these yourself in your application, but then, that was the state prior to the introduction of the Identity endpoints. The Identity API endpoints were added with the intention of improving this scenario, as I’ll discuss in the next section. The opinions in this post are obviously just my own, but they’re based on both how the ASP.NET team have described the APIs, what other people think about the design, and also my own feelings.

what is used for

An example of an answer-set programming language is AnsProlog, a specialized version of Prolog that avoids infinite loops when solving complicated problems. Short for Active Server Page, an ASP page is a dynamically created web page that ends with a .ASP extension that utilizes ActiveX scripting, usually VBScript or JScript code. The .aspx extension is used what is used for for Web pages that use Microsoft’s ASP.NET. These pages are called “Web Forms” and often contain (X)HTML, and ASP.NET code. You can get started with .NET on AWS by completing .NET on AWS training,  building .NET applications on AWS, or launching your first .NET application on AWS. Different .NET implementations can reuse the same code and libraries.


With version 1.0 of the .NET Framework, it was first released in January 2002. So a question comes to mind that which technology we were using before the year 2002 for developing web applications and services? Creating a CRUD (Create, Read, Update, Delete) API in ASP.NET Core with a MySQL database is a common scenario in web development. In this article, we’ll walk through building a complete ASP.NET Core Web API with a real-world use case. We’ll create a model called CSharpCornerArticle and implement CRUD operations for it using Entity Framework Core with MySQL. To better understand why the endpoints were added, it’s worth considering the existing recommended solution.

what is used for

The current implementation has no facility for customisation, so if they don’t work exactly as you want, then you’ll need to implement the whole API surface yourself from scratch. Even if you ignore all the potential security or architecture concerns, this one feels like it could well end up being a blocker for many people. Using the cookie implementation avoids the worst offender in the Identity APIs, but you still may want to reconsider whether the simplistic Identity endpoint approach is the best one to take.

What is ASP.NET? and it’s ARCHITECTURE

The compilation process also provides validation that all of the code is consistent. Interpreted languages would not identify this error until the code is actually run and tested. In a large application, it is very time consuming to manually test every scenario, or to write and maintain additional code that tests of every scenario, whenever code is changed. But ASP.NET is only used to create web applications and web services. I’ll keep this short, because if you’ve read the post, you’ll know my feelings already. Fundamentally, I think baking a token endpoint directly into ASP.NET Core Identity is going to encourage people to use a non-standard, less-secure solution, when we have many good alternatives.

  • You can add ASP.NET Core Identity and the default Razor Pages UI to your app by adding a few packages, updating your database schema, and registering some services.
  • There are different types of libraries with all the components to help developers and create applications.
  • ASP.NET applications can use all of the popular databases, including Microsoft SQL Server, MySQL, MariaDB, Postgres, MongoDB and CouchDB.
  • By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

This guide describes .NET 6 support provided by AWS services and tools. You can use Xamarin/Mono to run .NET apps on all the major mobile operating systems, including iOS and Android. Xamarin includes Xamarin.Forms, an open-source mobile user interface framework. The application model frameworks are a collection of developer tools and libraries that support fast and efficient .NET project development. Different frameworks exist for different types of applications, such as those listed below. In addition to an IDE, websites require web application server software and a hosting server.

What are .NET application model frameworks?

ASP.NET Core doesn’t allow headers to be added after generating the response body. All the middleware does it to create a new Stopwatch and add the elapsed ms as a custom response header named X-Took. I know that there are alternative and better ways of measuring performance on an ASP.NET Core API but that’s not really the focus here so play along. I’ve tried disposing the filestream before returning the file to the user, which seems to have had no effect.

The services are resolved via dependency injection or from ApplicationServices. ASP.NET Core uses dependency injection as a fundamental feature to manage dependencies throughout the framework. In order for the dependency injection framework to know how to resolve dependencies, these dependencies or “services” need to be configured first. During compilation, CLR translates the code into Common Intermediate Language (CIL). CIL code looks different because it is a lower-level machine code language.

.NET Standard

Starting his career on CSC’s elite R&D team testing leading edge platforms, Matt learned the importance of establishing standardized processes for developing web sites. At Embarc, a leading builder of web presences for biotech companies, Matt rose from developer to Director of Technology and board member. He went on to build and run, winner of PC Magazine Editor’s Choice for wiki services, which was acquired by Wakefly in 2011. At Wakefly, Matt upholds a process-driven standard of excellence to deliver exceptional quality and value. In the world of web and application development, there are many frameworks and languages that developers can choose from. The framework I will be discussing in this blog post is ASP.NET and ASP.NET Core.

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