--- title: "Top 10 .NET Core Libraries Every Web Developer Should Know" published_at: "2020-01-30T12:00:04+00:00" modified_at: "2024-12-19T09:05:24+00:00" url: "https://www.syncfusion.com/blogs/post/top-10-net-core-libraries-every-web-developers-should-know" excerpt: "Open-source libraries significantly reduce developers’ work and allow them to create and manage their applications easily. In this article, I’ll describe some of the most useful .NET Core libraries that every developer needs to know: Swashbuckle Polly AutoMapper SaasKit Diagnostics.HealthChecks..." taxonomy_category: - ".NET Core" - "ASP.NET Core" taxonomy_post_tag: - ".NET Core" - "ASP.NET Core" - "productivity" - "Tips and Tricks" --- # Top 10 .NET Core Libraries Every Web Developer Should Know [Nagaraj Marisamy](https://www.syncfusion.com/blogs/author/essential-studio) ![Top 10 .NET Core Libraries Every Web Developer Should Know](https://www.syncfusion.com/blogs/wp-content/uploads/2020/01/Top-10-.NET-Core-Libraries-Every-Web-Developer-Should-Know.png) Open-source libraries significantly reduce developers’ work and allow them to create and manage their applications easily. In this article, I’ll describe some of the most useful .NET Core libraries that every developer needs to know: - [Swashbuckle](#swashbuckle) - [Polly](#polly) - [AutoMapper](#automapper) - [SaasKit](#saaskit) - [Diagnostics.HealthChecks](#healthchecks) - [MailKit](#mailkit) - [CacheManager](#cachemanager) - [Dapper](#dapper) - [Ocelot](#ocelot) - [NLog](#nlog) ## Swashbuckle [Swashbuckle](https://github.com/domaindrivendev/Swashbuckle.AspNetCore) is a library that generates beautiful API documentation, including the Swagger UI, to explore and test API operations. This can be configured in your project and it will take only a few minutes to get started. **GitHub**: [Swashbuckle.AspNetCore](https://github.com/domaindrivendev/Swashbuckle.AspNetCore) **License**: MIT **Stars**: 2.8k ## Polly [Polly](https://github.com/App-vNext/Polly) , according to its website, “allows developers to express resilience and transient fault-handling policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner.” **GitHub:**[App-vNext/Polly](https://github.com/App-vNext/Polly) **License**: BSD-3-Clause **Stars**: 6.9k ## AutoMapper [AutoMapper](https://github.com/AutoMapper/AutoMapper) is a popular object-to-object mapper library used to map the properties of two different objects. This will reduce developer work and help us avoid unwanted code when mapping values. **GitHub:**[AutoMapper](https://github.com/AutoMapper/AutoMapper) **License**: MIT **Stars**: 6.9k ## SaasKit Building multitenant applications is quite difficult. But this library makes adding multitenancy as simple as possible. This library uses the concept of adding middleware using the OWIN interface. The author of this library has written many blog posts on how to configure [SaasKit](https://github.com/saaskit/saaskit) . Check the [blog](https://benfoster.io/blog/tagged/saaskit) out for more details. **GitHub:**[Saaskit](https://github.com/saaskit/saaskit) **License**: Apache License 2.0 **Stars**: 5.6k ## AspNetCore.Diagnostics.HealthChecks This project is a [BeatPulse](https://github.com/xabaril/beatpulse) liveness checker and UI port for the new feature included in the ASP.NET Core 2.2 version of Microsoft Health Checks. Using this library, we can monitor health checks for all apps, databases, APIs, Azure services, etc. This library can create beautiful UIs to display health checks.![AspNetCore.Diagnostics.HealthChecks](https://www.syncfusion.com/blogs/wp-content/uploads/2020/01/AspNetCore.Diagnostics.HealthChecks.png) **GitHub:**[AspNetCore.Diagnostics.HealthChecks](https://github.com/Xabaril/AspNetCore.Diagnostics.HealthChecks) **License**: Apache License 2.0 **Stars**: 1.1k ## MailKit [MailKit](https://github.com/jstedfast/MailKit) is a cross-platform mail client library built on top of MimeKit. The goal of this project is to provide the .NET world with robust, fully featured, and RFC-compliant SMTP, POP3, and IMAP client implementations. **GitHub:**[MailKit](https://github.com/jstedfast/MailKit) **License**: MIT **Stars**: 3k ## CacheManager [CacheManager](https://github.com/MichaCo/CacheManager) is an open-source abstraction layer written in C# for .NET. It supports different providers of caches and incorporates other advanced features. The CacheManager package’s main objective is to make life easier for developers to handle even very complex caching scenarios. **GitHub:**[CacheManager](https://github.com/MichaCo/CacheManager) **License**: Apache-2.0 **Stars**: 1.6k ## Dapper [Dapper](https://github.com/StackExchange/Dapper) is a simple object mapper for .NET. This high-performance micro-ORM supports SQL Server, MySQL, Sqlite, SqlCE, Firebird, and so on. It can be used by simply installing the NuGet package, which extends the IDbConnection interface functionality. The familiar Stack Overflow site is using this library. **GitHub:**[Dapper](https://github.com/StackExchange/Dapper) **License**: Apache-2.0 **Stars**: 11.8k ## Ocelot [Ocelot](https://github.com/ThreeMammals/Ocelot) is a. NET platform API gateway. This project is intended for people who use .NET or Core to run a microservice or service-oriented architecture that requires a unified system entry point. It will work with anything that uses HTTP. It runs on any ASP.NET Core-supported platform. **GitHub:**[Ocelot](https://github.com/ThreeMammals/Ocelot) **License**: MIT **Stars**: 4.5k ## NLog [NLog](https://github.com/NLog/NLog) is an open-source logging tool for use in applications for .NET and Xamarin. It’s free, cross-platform, and easy to set up and expand. NLog is a great easy-to-use logging application with excellent log routing and management features, making it a good choice when selecting a high-performance logging system. **GitHub:**[NLog](https://github.com/NLog/NLog) **License**: BSD 3-Clause **Stars**: 4.2k ## Conclusion I hope this blog has introduced you to some of the key open-source libraries of .NET. Besides these, you can find some more important libraries on this [GitHub page](https://github.com/thangchung/awesome-dotnet-core) . Syncfusion provides 70+ high-performance, lightweight, modular, and responsive [ASP.NET Core UI controls](https://www.syncfusion.com/aspnet-core-ui-controls) such as [DataGrid](https://www.syncfusion.com/aspnet-core-ui-controls/grid) , [Charts](https://www.syncfusion.com/aspnet-core-ui-controls/charts) , and [Scheduler](https://www.syncfusion.com/aspnet-core-ui-controls/scheduler) . You can use them to improve your application development. Please share your feedback in the comments section. You can also contact us through our [support forum](https://www.syncfusion.com/forums) , [support portal](https://support.syncfusion.com/) , or [feedback portal](https://www.syncfusion.com/feedback) . We are waiting to hear your feedback!