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The state of the art

The state of the art

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The state of the art

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  1. C#/.NET The state of the art Ian Cooper http://iancooper.livespaces.com

  2. The shape of things to come (1) • Who are you? • What is your language • Why do you use it? • What kind of projects is it most suited to? • What kind of projects is it least suited to? • What are you using it for today? • 3 exciting new developments • Frameworks that fuel adoption Ian Cooper http://iancooper.livespaces.com

  3. The shape of things to come (2) • What is the future for your language? • What is the future for dynamic and scripting languages in general? • What other languages do you use? Ian Cooper http://iancooper.livespaces.com

  4. Who do you think you are? Foxpro Windows 1992: C++ MFC 1994: Win 32 COM ATL C# .NET 2002: NUnit LDNUG Wilson Wix MVP NHibernate Nant Monorail Ian Cooper http://iancooper.livespaces.com

  5. Cool, sharp, lightning • 1997: Project Lightning • COM+ 2.0 • The Universal Runtime • Project Cool • Anders Hejlsberg worked on derailed J++ • C# shows J++ heritage (delegates, WFC) • C# • C-family language for .NET • Open source and commercial implementations Ian Cooper http://iancooper.livespaces.com

  6. Why? Object Oriented using System; namespace ShowFeatures { class Program { static void Main(string[] args) { Program program = new Program(); program.PrintGreeting(args[0]); } private void PrintGreeting(string to) { System.Console.WriteLine("Hello {0}", to); } } } C family language Garbage Collection Strongly Typed Access to extensive .NET libraries Ian Cooper http://iancooper.livespaces.com

  7. Where can you use it? C# VB XAML Others… .NET Framework ADO.NET ASP.NET Windows Forms Windows Communication Foundation Windows Presentation Foundation … Base Class Library Common Language Runtime Ian Cooper http://iancooper.livespaces.com

  8. Where is it not suitable? • Not a systems development language • Restricts ‘unsafe’ operations like pointer manipulation • Overhead of runtime, not ‘to the metal’ Ian Cooper http://iancooper.livespaces.com

  9. What are you using it for today? • Web based underwriting system • Geographically distributed user base • Internet and intranet access • Highly scalable • Document Generation system • Highly reliable, scalable, and robust • Multi-threaded • Extensible pipes and filters architecture Ian Cooper http://iancooper.livespaces.com

  10. <book> <title/> <author/> <year/> <price/> </book> Relational Objects XML LINQ C# 3.0 VB 9.0 Others… .NET Language Integrated Query LINQ toObjects LINQ toDataSets LINQ toSQL LINQ toEntities LINQ toXML Ian Cooper http://iancooper.livespaces.com

  11. C# 3.0 Language Extensions Query expressions var contacts = from c in customers where c.State == "WA" select new { c.Name, c.Phone }; Lambda expressions var contacts = customers .Where(c => c.State == "WA") .Select(c => new { c.Name, c.Phone }); Extension methods Anonymous types Object initializers Ian Cooper http://iancooper.livespaces.com

  12. Workflow Foundation Classes • Workflow Runtime Engine • In-process, multiple hosting options • Provides support for long-running transactions • Leverages idea of code as data • Activities are .NET components • Both off-the-shelf and custom • Both simple and composite • Flow is described by XAML • Both rules and conditions supported Ian Cooper http://iancooper.livespaces.com

  13. Dynamic Language Runtime • Services that run on top of CLR • Dynamic type system • Dynamic method invocation • Implement dynamic languages like Python and Ruby on the .NET Framework • Microsoft issued under permissive source, so can ship with open source projects like Moonlight • VBx • VB to be recast as scripting language? Ian Cooper http://iancooper.livespaces.com

  14. What drives adoption? • Windows Forms • RAD smart-client development • Successor to VB, PowerBuilder, et al. • Webforms • Moved rich-client developers to web • Incorporates ASP.NET Ajax • Monorail challenging page controller approach • Silverlight • Rich media content via CLR on the browser Ian Cooper http://iancooper.livespaces.com

  15. The future • Cw or Comega • Asynchronous concurrency constructs • PLINQ may use Cw features • F# • Mixed functional/imperative language • Influenced by Ocaml • DSLs • Partial methods and classes, Guidance Toolkit • Software factories, MDA, something else? Ian Cooper http://iancooper.livespaces.com

  16. Dynamic Languages? Source: Tiobe Programming Community Index Ian Cooper http://iancooper.livespaces.com

  17. Guilty Pleasures • Don’t use others but • Learning Ruby, because the smart kids are. • Early Ruby adoption around Watir or scripting • Later Ruby adoption around IronRuby • Intrigued by Boo • Used by Monorail for Brail • Little Knowledge outside .NET space Ian Cooper http://iancooper.livespaces.com