2 Become 1 - Story of .NET Frame** and .NET Core

The merger of .NET Framework and .NET Core was completed with .NET 5 in November 2020. 

The new cross-platform framework was now known simple as .NET.

.NET Framework was Windows only; .NET Core was its cross-platform, open source, cooler cousin.

The "Core" branding was dropped and .NET was now the mainline successor of .NET Core 3.1. .NET Framework 4.8 was frozen with no new features planned.