Microsoft Framework offers a robust & secure communications foundation for applications to communicate to data bases & the cloud.  Version 5 will move to a more open design as shared in article below

https://redmondmag.com/articles/2019/12/31/coming-in-2020-net-5.aspx

Due in November 2020, .NET 5 (no “Core” and no “Framework”) will mark the transition from the aging, proprietary, Windows-only .NET Framework to a modern, open source, cross-platform .NET.  Microsoft has said the first .NET 5 preview is expected in the first half of 2020 combining separate source code streams such as .NET Framework, the existing .NET Core and Xamarin/Mono, and including components such as ASP.NET Core and Entity Framework Core.