I found some new classes and functions have improved (read: different!) names in final R2 release than during beta. I manually renamed offending classes + functions in my own test code using Edit Source.

There may be more such classes/functions so beware as you migrate code from beta release into final release! 

.NET Interop

Final R2 release renames new classes CSharpXxx => DotNetXxx. Methods renamed likewise.

// R2 .NET Classes (class during beta)
DotNetAssembly     // CSharpAssembly
DotNetObject       // CSharpObject

// R2 Assembly Functions (function during beta)
LoadWithDotNetFramework  // LoadWithNetFramework
LoadWithDotNetCore       // LoadWithNetCore
GetDotNetCoreVersion     // GetCoreVersion

I suggest you auto-generate code for .NET classes once more using the final R2 release since auto-generated code has changed. Code is now more encapsulated. Code also has more error-handling options than during beta.

RibbonBar control

Final R2 release renames "load from file" functions to include the word File.

// R2 Ribbon Functions (function during beta)
LoadFromXMLFile        // LoadFromXML
LoadFromJSONFile       // LoadFromJSON

Enjoy and stay safe! /Michael