Essential .NET Core Libraries Every Programmer Should Know


.NET Core apps have been trending for a long time due to their platform independent architecture and modern features.

With each passing day, stakeholders provide new requirements, and to fulfill them; organizations need to revamp their applications. However, with .NET Core libraries, developers can extend functionality and add new features quickly.

There are different libraries that a .NET developer can use for different purposes.

As you read on, you will find out what some of the .NET Core libraries are and how they benefit dot net programmers while developing applications.

A deep dive into the best .NET Core libraries


As the name suggests, AutoMapper is an object-to-object transforming .NET Core library.

It helps developers configure automated transformation of objects from one type to another. The only rule is that both objects must follow its defined convention.

Apart from providing the code mapping mechanism, it also helps to test the mapping in each application layer to resolve conflicts between layers. To take full advantage of the AutoMapper library, you must configure it in the application startup file.

Therefore, you can eliminate manual implementation tasks of class property mapping and reduce effort. This will save you time and budget for your project.


If you want to add real-time functionality to .NET Core apps, SignalR should be your best library.

It is available under an open-source license and is freely accessible to effortlessly push code from server to client systems. Most organizations prefer it for high-performance software, such as games, online voting, and GPS-based applications.

You can include it in your code by configuring the SignalR API, which creates remote procedure calls for the server-client architecture. Moreover, it manages the communication channel and resources to transparently transfer the data in case of high traffic.

Additionally, WebSocket, Long Polling, and Server-Sent Events are the three main options for enabling SignalR’s real-time data stream.


You must have worked with many SaaS applications, accessing them without installing them on your system.

Sanskrit is a popular .NET Core library, allowing engineers to build SaaS applications with multi-tenant capabilities. It allows various users to access the web application and use its services through a single instance.

You can use it for various purposes, such as:

  • Resource utilization optimization
  • You should configure a single instance in the production environment for easy deployment.

Additionally, you can pair it with other libraries, such as SignalR, to extend the functionality of SaaS software. And with collaboration aids from OWIN and Microsoft to generate intermediate OWIN components to streamline the development process.


Swagger documents are an essential part of software projects because they help systems accurately define and read the structure of the application.

To produce swagger documentation for .NET Core applications, Swashbuckle is an easy-to-implement technology. You can quickly learn it and use it to generate. NET-based Web API documentation.

Its overall functioning depends on the three main components, AspNetCore.SwaggerGen, AspNetCore.SwaggerUI and AspNetCore.Swagger. All three work together to provide JSON and XML files containing responses.

Moreover, it synchronizes the server-client API documentation, leading dot net core programmers to improve API operation. In addition, you can also use these documents for application hardening and migration purposes.


To link a serverless database to the .NET Core application, LiteDB can guarantee you a lightweight and high-performance NoSQL solution.

You can use it for various software including mobile apps, desktop apps, and web apps. Moreover, it provides built-in modules to assign an individual database to each user.

It comes in a DLL file, which consumes less than 450 KB of memory and is compatible with .NET version 4.5. It offers the following features:

  • You can enable write locks for each collection.
  • It allows data communication between collections, providing thread safety.
  • You can execute data insert, update, and delete statements using SQL commands.
  • It provides a built-in plan explanation mechanism to check whether the query will be reliable for an application or not.

Bcrypt .NET-Core

Data security is always a top concern when developing any software.

And to ensure data integrity in .NET Core applications, you can effectively use the Bcrypt library. It encrypts data and converts the original text into hash values.

To prevent attackers from reading the data and using it for personal gain, the hash functions as a robust defensive layer. You can install it via NuGet and configure it in ASP.NET Core apps by following the code syntax provided below.

string passwordHash = BCrypt.Net.BCrypt.HashPassword("Pa$$w0rd");

The code hashes the string Pa$$w0rd and store the value in password hash.

Similarly, you can also use. NET-based software enhances its security and prevents a data breach.


To ensure that your business solution is working properly, checking its health is a common practice.

It provides total application availability, performance of every custom and built-in API, database, microservices, and components. To report on the health of the .NET Core application, developers use the Diagnostic.HealthChecks library. It communicates with and provides a full performance report.

It covers all elements of the app, from analyzing cache performance to third-party integrations.

You can set it up in your ASP.NET Core apps by following the steps below.

Step 1: Open the Visual Studio IDE and create an ASP.NET Core app project.

2nd step: Install it Microsoft.Extensions.Diagnostics.HealthChecks and Newtonsoft.Json.

Step 3: Open the boot file and save it as that including services.AddHealthChecks(); in code.

Step 4: Access the Configure method and set the path to the endpoint.

Step 5: Once you have completed all four steps, you need to access your localhost, and it will provide you with the health status.


Communication is seen as the key to a better business and building strong customer relationships.

And to let users exchange their files, thoughts, and queries, you can enable sending and receiving mail in .NET Core apps through MailKit. You can install it using the project.json file or by accessing the NuGet package manager.

It connects .NET Core software to an external SMTP server and allows end users to communicate via email.

In addition, it allows a large volume of mail to be sent in a secure environment, since it uses an asymmetric cryptography mechanism based on TLS or SSL.


Dapper is another .NET Core mapping library focused on mapping between programming language and database.

It is the second most popular ORM library, ensuring high performance, speed and flawless configuration. You can implement it in three easy steps. First you need to generate an IDbConnection object, then you need to write a query for CRUD operations. Also, you need to pass the request into the execute method.

Once all the steps are done, Dapper will start working in your ASP.NET Core app.

Which library does the .NET developer prefer?

Each .NET Core library performs a unique function and follows different mechanisms to attach to the .NET Core application.

To discover the most appropriate library, .NET developers follow these steps:

Step 1: Check the ASP.NET Core app requirements.

2nd step: Analyze .NET Core library features and modules.

Step 3: Check requirements with library features.

Step 4: Select it for software development if the requirements match the features of the .NET Core library.

Dot Net Programmer’s Final Words

.NET Core is an advanced development technology offering various tools and libraries to extend application functionality.

From binding a serverless database to enabling messaging features and automating the object-to-object mapping process, it provides all the essential functionality to reduce workload. All libraries are easy to implement and optimize application performance.

Moreover, every developer should learn .NET Core library configuration to improve productivity, reliability, and security.


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