• New Roslyn-based codegen, compile time and run time
• Public APIs:
  • Core API for Event Sourcing
  • Most methods of Grain class are now virtual
  • ASP.NET vNext style Dependency Injection for grains
  • New telemetry API
• Portability:
  • Support for C# 6.0
  • Improved support for F# and VB
  • Code adjustments towards CoreCLR compliance
  • Orleans assemblies are not strong-named anymore
• SQL:
  • OrleansSQLUtils.dll for SQL-related functionality
  • MySQL is now supported as a cluster membership store
  • Storage provider for SQL Server
• Serialization:
  • Support for pluggable external serializers
  • Bond serializer plugin
  • Support for Json.Net as a fallback serializer
  • Added [KnownType] attribute for generating serializers for arbitrary types
• Upgraded to Azure Storage 5.0
• Upgraded to .NET 4.5.1
• Other fixes and improvements