The .NET Framework: .NET Framework is a Microsoft-developed software framework that includes a runtime environment for creating Windows apps and Web services. It covers a large class library called the .NET Framework class library; which is a combination of classes, interfaces, and value types that provide access to system functionality. .NET Framework provides a runtime software environment that executes in a Common Language Runtime (CLR). The .NET Core: The .NET Core is a free and open-source cross-platform software framework for the operating systems of Microsoft Windows, Apple macOS, and Linux. .NET Core is simply a combination of the ASP.NET MVC and the GitHub Web API. This blog gives you information on the functionality of these programs and helps you to differentiate between them. Installation: 1) .NET Framework requires a single Windows program and runtime framework to be installed. 2) .NET Core is cross-platform and must be packaged and installed independently of the operating system underlying it. NuGet packages included in the. NET Core must be compiled by the developers. Library: 1) The. NET framework can utilize robust class libraries. These class libraries implement many common functions, such as file reading and writing, graphical rendering, database interaction, and XML document manipulation. 2) The. NET Core may even take advantage of robust class libraries, but it even uses a redesigned common language runtime called CoreCLR, where developers choose to select and use only the libraries required for the application and can remove unnecessary libraries. Cross-Platform Compatibility and Open Source: 1) The. NET Framework allowed developers to construct applications on a single platform such as Windows. The .NET Framework was released as a licensed software framework for proprietary use. Subsequently, Microsoft produced certain components of the .NET open-source framework. 2) The. NET Core is cross-platform, meaning it is compatible with different operating systems such as Windows, Linux, and even Mac Platforms. The company has released .NET Core as an open-source platform for applications. Hence, .NET Core allows companies as well as individual developers to build apps without paying any licensing fees. Mobile App Development: 1) The. NET Framework does not provide a comprehensive framework or tools for easing mobile app development. 2) The. NET Core is compatible with Xamarin via the .NET standard library. Thus, developers can take advantage of Xamarin to write mobile cross-platform apps with a shared code base and the same set of APIs in C #. They can also use Xamarin’s tools to customize the Mobile App for individual mobile platforms such as iOS, Android, and Windows Phone. Modular Collection of Libraries: 1) The. NET Framework and. NET Core enables developers to leverage robust class libraries. 2) The. NET Core uses a redesigned common language runtime called CoreCLR and includes a modular library collection called CoreFX. Therefore, developers have the option to select and use only the libraries required by each application and improve the performance of the application by removing unnecessary libraries.