The .NET Framework 4.6.1 includes new features in the following areas:

• Cryptography

• ADO.NET

• Windows Presentation Foundation (WPF)

• Windows Workflow Foundation

• Profiling

• NGen

For more information on the .NET Framework 4.6.1, see the following topics:

• The .NET Framework 4.6.1 list of changes

• The .NET Framework API diff (on GitHub) 

• .NET Framework 4.6.1 Web Installer   .NET Framework 4.6.1 Offline Installer