Helloworldgeeks organized event on Language internals.

1. By Abhishek Sur
Website: www.abhisheksur.com
Email : contact@abhisheksur.com

2. .NET Infrastructure
User Interface Services Data Access
ASP.NET
Windows Windows Windows
(Web Forms, Entity
Presentation Communication Workflow ADO.NET
MVC, Dynamic Framework
Foundation Foundation Foundation
Data)
Win Forms Data Services LINQ to SQL
Cloud
(ODATA)
Core
Objects Generics LINQ Dynamic Async
Base Class Library
Common Language Runtime

3. Agenda
Iterators
Delegates
Events
Language Generics
GEMS Extension Methods
LINQ
Dynamic Types
Async

4. What are loops ?
 A repetition of instructions ?
 A logical jump in code
 Or a representation of GoTo with a condition…
Types of Loops
 While
 do-while
 for
 goto ?... Lets take an example

5.  Represented by IEnumerable and IEnumerator
(which is not a collection)
 Ability to Pause – Resume a method.
 foreach is a syntactic sugar to iterate over an
iterator.
 Yield is used to generate an iterator

7. Iterators

8. Delegates
 Delegates are special types
 Delegate points to Methods
 MulticastDelegates maintains an Invocation
List
Events
 Events are Wrappers to Delegates
 Cleaner pattern to handle Delegates
 Allows components to subscribe to it by
passing event handlers.

9. Delegates & Events

10. Generics
 Type as Template
 Constraint on Generic Types
 It can be applied on Types, Method, Delegates
etc.
 Variance is supported
Extension Methods
 Extend your predefined Types without
inheritance
 Uses ExtensionAttribute to identify extension
method.

11. Generics &
Extension Methods

12. Anonymous Language Object
 Object can exist in language without name
 Cleaner codebase.
 Anonymous methods are used as Closures.
 We use delegate to refer anonymous methods
and var for types.
LINQ
 Search inside Managed objects
 Simple projection, selection, grouping, joins
and many more…

13. Anonymous Types &
LINQ

14. Dynamic in .NET 4.0
 CLR is mostly static type
◦ Compile time type checking
 DLR added dynamism to .NET
◦ Run time type checking
 Object – Static type, base class
 var – is ALSO static type, compiler inferred
 dynamic – Evaluation deferred
 Expandable objects

15. Dynamic

16. New Asynchronous Pattern
 Contextual async & await pattern simplifies
complex Threading model or existing pattern
of coding
 Async is not about Concurrency but rather it is
truly asynchrony.
 It can easily plugged in without changing the
logic.
 Compiler generates state machine to resume
methods

17. Async & Await

18. Exposing the Compiler
 Ability to run compiler as a service.
 Syntax tree, Binder, Expression all are
available through code.

19. Abhishek Sur, MVP (Client App Dev)
www.abhisheksur.com
Email: contact@abhisheksur.com
Twitter : @abhi2434
Thank you.