ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern,cloud-based,Internet-connected applications. With ASP.NET Core, you can:

• Build web apps and services, IoT apps, and mobile backends.
• Use your favorite development tools on Windows, macOS, and Linux.
• Deploy to the cloud or on-premises.
• Run on .NET Core or .NET Framework.

Why use ASP.NET Core?

Millions of developers have used (and continue to use) Asp.Net 4.x to create web apps. ASP.NET Core is a redesign of ASP.NET 4.x, with architectural changes that result in a leaner, more modular framework.

ASP.NET Core provides the following benefits:

• A unified story for building web UI and web APIs.
• Integration of modern,client-side frameworks and development workflows.
• A cloud-ready, environment-based configuration system.
• Built-in  dependency injection.
• A lightweight, high-performance, and modular HTTP request pipeline.
• Ability to host on IIS, Nginx, Apache ,Docker, or self-host in your own process.
• Side-by-side app versioning when targeting .NETCORE.
• Tooling that simplifies modern web development.
• Ability to build and run on Windows, macOS, and Linux.
• Open-source and community-focused.