1. The document discusses new features being added to managed languages like C# and Visual Basic in Visual Studio 2010, including dynamic programming, variance with generic types, and improved COM interoperability. 2. Dynamic programming allows interacting with dynamic objects through the new Dynamic Language Runtime, variance allows specifying how generic types can be used, and COM interoperability enables embedding COM type information directly in assemblies. 3. Other topics covered include F# being included for the first time and references to future plans and commitments for C# and VB evolution.

1. Managed Languages in VS2010 Mike Taulty Developer & Platform Group Microsoft Ltd [email_address] http://www.mtaulty.com (/DevWeek.zip)

2. Format of the session 1 2 3

4. Visual Basic 10 1

5. Visual Basic 10 Additions

6. C# 4.0 2

7. C# 4.0 Additions

8. Combined Additions 3

10. Dynamic Programming in VS 2008 ( taking Reflection as one example ) Compiler Generates reflection-based goo Compiler Does not generate anything 

11. Dynamic Programming in VS 2010 Generated Code Uses System.Dynamic Compiler Compiler Like object but with dynamic method resolution & dispatch Plain CLR Object? IDispatch COM object? Implementation of IDynamicObject? Run-time type?

12. Dynamic types in C# 4, VB 10

14. Variance with Generic Types Concrete Examples NB: Snippets compile but (intentionally) throw at runtime in VS2008 here Strings are objects? Strings are objects? Safe if the caller cannot pass object references to the implementation Safe if the implementation cannot pass object references to the caller

16. Variance in generic types

20. COM Interoperability

21. Format of the session 1 2 3

24. © 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.