1. Developer Knowledge Sharing Eric Sun Dec, 2007

2. What programming language did you learn in school and since then? Now, its time to refresh …

3. Test: Find Even Numbers C# 1.x – Loop in Collection (Array) C# 1.x – Delegate (Custom Delegate) C# 2.0 – Iterators (yield return) C# 2.0 – Delegate (Predicate ) C# 2.0 – Anonymous Method C# 3.0 – Lambda Expression C# 3.0 – LINQ (Language integrated Query) C# 3.0 – Extended Method

4. Class/Type/Object C# 1.x – Everything becomes class (OOP) C# 1.x – Runtime Type Info / Reflection / CodeDom C# 2.0 – Partial Class, Static Class C# 3.0 – Anonymous Class C# 3.0 – Implicit Type Variable C# 3.0 – Object and Collection Initializers C# 3.0 – Extended Method

5. Properties C# 1.x – Introduced properties C# 2.0 – Property access modifier C# 3.0 – Automatic property C# 3.0 – Object Initializers

6. Generics Generics is the ability to have type parameters on type. They are also called parameterized types or parametric polymorphism. Type Safe Collection: List EventArgs: EventHanlder Validation: IsInRange (min, max) Controller Demo: Presenter

7. Lambda Expression Lambda expression defines an anonymous function using the following syntax One parameter: x => x + 1 Two parameters: (x, y) => x * y No parameter: () => new Test() Expression Tree

8. LINQ Select: Default, Anonymous Class, Dictionary Where: Static, Dynamic Query Group: Aggregation, e.g. count Join: Inner Join, Out Join, Group Join Order: e.g. order by count desc Demo: Order – Appraiser Assignment

9. Whats Next Once you learnt how to drive, what are the rules to be on the road? Design Patterns ASP.NET Web Services / WCF Smart Client / WPF Q & A