C#: What is the .NET ecosystem?

.NET — cross-platform development platform from Microsoft.

Components:

1. .NET Framework:

• Windows-only.
• Legacy.
• Version 4.8 is last.

2. .NET Core / .NET 5+:

• Cross-platform (Windows, Linux, macOS).
• Open source.
• High performance.
• Modern .NET (version 5, 6, 7, 8...).

3. Mono:

• Cross-platform.
• Used in Unity.
• Xamarin.

4. Xamarin:

• Mobile development.
• iOS, Android.

5. MAUI:

• Modern Xamarin.
• Cross-platform UI.