The .Net Framework provides the necessary compile time and run-time foundation to build and run any language that conforms to the Common Language Specification (CLS). What is .NET Compact Framework? .

Dear Lifehacker, What is the "Microsoft .NET Framework" and why do I need it? I've been trying to install BlackBerry Desktop, but it fails and states I'm missing the Framework.

You can check the .NET Framework version installed on Windows using Command Prompt, Registry, PowerShell, Explorer, NET Version Detector.

Fix .NET Framework Installation Did Not Succeed, Download failed with error code 0x800c0006 on Windows 11/10 effectively using one of these working solutions.