Backend Development with .NET: An Overview of Features, Frameworks, and Use Cases

Behind the scenes, backend development with .NET is what puts together a web application’s databases, backend logic, architecture, APIs, and servers that make a cloud-based app’s frontend work the way it should.

What are the Core Frameworks in .NET?

Think of the core frameworks in .NET as different parts of a house foundation, made up of key parts like Common Language Runtime (CLR) which manages the execution of .NET apps, and ASP.NET Core which is the modern web framework responsible for building your next web application. But there are other core frameworks that may become involved in the making of your internet app.

Base Class Library (BCL) is a core class library and a core framework for .NET, providing developers with a collection of reusable classes and functions for various programming tasks. Then there is .NET Standard, which is a library filled with APIs for different .NET implementations such as .NET Core and .NET Framework.

Another useful core framework, one that simplifies database interaction, is Entity Framework, an object-relational mapper.

With Microsoft’s .NET and its core frameworks, backend developers have a unified programming model with a huge ecosystem of libraries and packages at their disposal, making it easier to create the foundation and core functionality of any internet application. As a 2013 study from the Helsinki Metropolia University of Applied Sciences found from using .NET’s Entity Framework and ASP.NET Framework, the use of Entity Framework made database modification and update “easy by using generate and update model from database features of the framework … A large variety of the classes offered by the ASP.NET framework library made the creation of the application easier.”

The different kinds of core frameworks mentioned each play a role in helping developers build a cloud-based application that offers key features like cross-platform compatibility, robust security, scalability, and faster performance and optimization.

What are the Key Features of .NET for Backend Development?

.NET offers a variety of key features that improve your web apps such as language interoperability, automatic memory management, input validation and XSS protection, and enhanced scalability through cloud integration and microservices architecture.

• Cross-Platform Compatibility: .NET supports cross-platform backend development, regardless of whether you need your online app to be developed for Windows, macOS, or Linux. Development tools such as Visual Studio and Visual Studio Code, and the ASP.NET Core framework are all cross-platform.
• High Performance and Optimization: .NET offers Just-in-Time (JIT) and Ahead-of-Time (AOT) compilation, allowing for faster code execution. Automatic memory management, such as with .NET’s default Concurrent GC, also aids in performance and optimization.
• Improved Security for Backend: .NET provides built-in security features such as authentication and authorization mechanisms through ASP.NET Core Identity. Other built-in features include input validation, protection against cross-site scripting (XSS) and cross-site request forgery (CSRF), password management, and enforcing HTTPS by default. .NET also includes encryption libraries.
• Language Interoperability: Developers can combine C#, VB.NET, and F# all into one internet application. This allows developers to use specific languages to perform tasks, aiding in type safety, reducing errors, and preventing bugs.
• Scalability and Reliability: .NET’s support of microservices architecture, cloud integration with Azure, and asynchronous processing ensure that your web application maintains its scalability, flexibility, and resilience as it grows in users and traffic.

Being able to tap into advanced web application technologies like cloud computing and microservices architecture can provide additional options for scaling and evolving your application.

A 2018 study from the Proceedings of the 10th Asia-Pacific Symposium on Internetware compared performance between monolithic and microservices architectures. While their experiment found performance improvements in 7 out of 12 test cases after migrating to microservices, it’s important to note that architectural decisions should be based on specific business needs. Microservices can offer benefits like independent scaling and deployment of components, but they also introduce additional complexity in areas like service communication, data consistency, and system monitoring. Both monolithic and microservices architectures can be effective choices depending on factors like team size, application complexity, and scaling requirements.

To give you the full benefit of these features, it will take more than just the core frameworks, but also a variety of other tools and libraries that .NET developers use when building online applications.

What Tools and Libraries Are Used for .NET Backend Development?

During your web application’s .NET backend development, your development partner may use an assortment of tools and libraries such as Visual Studio for an integrated development environment (IDE), NuGet for dependency management, MSTest for unit testing in .NET, and CI/CD tools like Azure DevOps and Jenkins.

• Visual Studio and Visual Studio Code serve to provide a development environment that allows for debugging, code refactoring, and more. There are also dedicated debugging such as Visual Studio Debugger and performance analysis tools like dotTrace that developers may use.
• Dependency management, such as with NuGet, allows your .NET backend developers to integrate and manage libraries seamlessly.
• Testing frameworks such as xUnit, NUnit, and MSTest help ensure code reliability through comprehensive unit testing, integration testing, and test automation capabilities.
• Useful libraries include the likes of Serilog for improved structured logging and Dapper for lightweight object-relational mapping (ORM) capabilities.

These tools and libraries make it easier for .NET development partners to make efficient and high-performing cloud-based apps for organizations like yours. For example, a 2024 study from the Blekinge Institute of Technology’s Department of Software Engineering found that, along with using MSTest for unit testing, researchers were able to achieve a 92.5% automated test coverage with the help of Azure DevOps’ testing capabilities, helping ensure that each module was written properly and works correctly.

Between the core features of .NET and its different tools and libraries, a web app developer has the ingredients necessary to create a solid backend foundation for your next cloud-based application.

The Steps to Setting Up Your Backend Environment with .NET

Before the .NET backend can be developed, your web application developer will need to have their integrated development environment, libraries, command line interface, and version control tools selected and set up for the real work to begin. Here’s how it might look using previously mentioned components:

• The .NET SDK (Software Development Kit): A developer will first install the .NET SDK which acts as a tool bag containing the .NET runtime, libraries, and any command-line tools.
• Development Environment Setup: Developers can use either Visual Studio, a full-featured IDE, or Visual Studio Code with the C# Dev Kit extension. Visual Studio provides comprehensive .NET development features including IntelliSense, debugging, testing tools, and advanced refactoring capabilities. Visual Studio Code, when configured with .NET extensions, offers a lightweight yet powerful alternative that supports the full range of .NET development while maintaining flexibility for other languages and frameworks.
• .NET CLI (Command Line Interface): The tool that allows developers to build, run, test, and publish apps with a .NET backend.
• Git: The developer should set up proper version control, using something like Git to manage code repositories and code tracking.
• NuGet: Acts as a package manager for .NET, so that the developer can install libraries and dependencies all while maintaining a reference list of packages used and the ability to restore or update those packages.

How Are RESTful APIs Made in .NET

Making RESTful APIs in .NET backend development is crucial for ensuring that the web application will interact properly with any and all its important features, services, and other apps.

• Creating a New API: When creating an API, the developer will use tools like .NET CLI.
• Endpoints: These create points where an API can be asked for information or to receive data.
• Middleware: These are used for API management, like checkpoints that make sure a user is authorized before allowing their request to pass through.
• Input Validation: The API needs to be able to perform input validation, referring to checking any incoming data to ensure it adheres to expected formats and constraints.
• Model Binding: The API should also have model binding for proper data mapping.
• API Testing: The developer will need to test the API to make sure it works.
• Enhancements: Any additional features to improve the API’s performance such as rate limiting and caching are added.

Steps for Database Integration and Using ORMs

Database integration ensures that there is a place for a web application to store, retrieve, and manage. Tools like ORMs (Object-Relational Mapping framework) help simplify data operations by letting developers work with any data using objects instead of code. For online applications, developers will need to account for cloud-specific aspects.

• Choosing a Cloud Provider and Database: A developer will need to choose a cloud provider like Azure or AWS along with a database service such as Azure SQL Database or AWS RDS.
• Making a Database Instance: Cloud environments make it possible to have a database instance. This involves choosing configuration options like database engine, size, and performance.
• Selecting an ORM: Popular ORM options include the likes of Microsoft’s own Entity Framework Core, and other ORMs like Dapper and NHibernate.
• Designing a Data Model: The developer defines entities and relationships in the .NET code and creates classes to represent tables in your database based on the requirements of your cloud-based app.
• Configuring the ORM: Now the ORM gets configured to connect to your cloud database instance.
• Developing Application Logic: The ORM can now be used to interact with the database once code has been written to define how that data will be manipulated, accessed, and interacted within the cloud-based database.
• Deploying to the Cloud: After making sure that the online app is connected to the database instance, it’s finally time for deployment.

What Are Some Use Cases in .NET Backend Development for Web Applications?

.NET backend development meets the needs of uses cases for big and small organizations looking to make a web application.

• Small and startup companies can use the rapid development capabilities of .NET to quickly have a minimum viable product (MVP) ready for the market, such as a scalable Software-as-a-Service internet app.
• Medium-sized businesses looking to create a new e-commerce platform or improve their operations with a customer relationship management (CRM) system can find a reliable and scalable solution with .NET’s ability to handle complex backend processes and adapt to your growth.
• Large enterprises, such as financial institutions, healthcare organizations, and industrial manufacturers can rely on a .NET backend to support their online applications such as their money management platforms, patient portals, and inventory management systems with the integration of Azure in their .NET backend. Examples of Azure integrations at work include Azure Functions for serverless execution of .NET code to carry out lightweight backend tasks, Azure Load Balancer to better distribute traffic across .NET backend instances, and Azure SQL Database which supports Entity Framework and is optimized for .NET web apps.

Some real-world examples of applications that use .NET in their technology stack include Microsoft’s Azure Portal, Stack Overflow, and IIS (Internet Information Services). Enterprise platforms like the Microsoft 365 admin portal and Visual Studio’s cloud services also heavily utilize .NET backend technologies.

As a demonstration of how .NET backend development works in the building of enterprise internet apps, a 2018 study from St. Cloud State University made use of ASP.NET Core MVC and Entity Framework Core to help create a timesheet management web app and give it cross-platform capabilities as well.

The resulting system architecture had ASP.NET Core MVC Framework act as the presentation layer for user interaction while the Entity Framework Core served as the Data Access Layer. With C# classes and Repository services for the Business Logic Layer and MS SQL for the Relational Database, the researcher had created an internet app that neatly utilized the .NET ecosystem for every layer and kept each layer’s responsibilities contained within themselves.

What Are the Challenges of .NET Backend Development for a Web App?

Just as there are numerous key features and advantages to using .NET backend development for your web app, there are challenges that you’ll want to make sure a development partner is either prepared to handle or knows how to avoid:

• High Learning Curve: Navigating advanced concepts such as asynchronous programming and dependency injections require a developer with serious expertise.
• Database Challenges: Improper database design, poor indexing, or lack of caching can all negatively impact performance.
• Risk of Server Overload: Unless a development partner is experienced in load balancing, there is risk of server overload or application hanging.
• Unnecessary Logging: Log files may end up bloated with too much information logging, which in turn can impact performance.
• Dependency Conflicts: An inexperienced developer may encounter issues with handling multiple libraries and their different versions.
• Excessive Garbage Collection Pauses: If too many objects are created and not properly disposed, your .NET backend may experience more frequent garbage collection pauses.

Fortunately, all these challenges can be resolved by an experienced .NET backend developer, allowing for an internet app to take full advantage of the benefits. This just makes it even more important to find a capable developer who has a thorough understanding of how to work with .NET.

What Can the Right Developer Do to Address the Challenges of .NET Backend Development?

• Optimize Database Design: Using proper database indexing, efficient queries, and leveraging caching mechanisms all contribute towards better performance, reliability, and scalability in your internet application.
• Proper Logging: By implementing selective logging, only important information will be captured.
• Code Optimization: Regularly reviewing code and refactoring when needed will help prevent performance bottlenecks.
• Implementing Scalable Architecture: Adopting a cloud-based solution and using microservices architecture can ensure scaling for future growth.