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C# Features n n Native support for core. NET framework Supports traditional OO concepts such as w Inheritance w Polymorphism w Operator overloading n n C/C++ like syntax No more global variables ILM Proprietary and Confidential - http: //www. ilmservice. com

A Simple C# Program using System; class Hello { static void Main() { Console. Write. Line("Hello, world"); } } ILM Proprietary and Confidential - http: //www. ilmservice. com

Arrays n Can be single dimension or multi-dimension class Test { static void Main() { int[] a 1 = new int[] {1, 2, 3}; int[, ] a 2 = new int[, ] {{1, 2, 3}, {4, 5, 6}}; int[, , ] a 3 = new int[10, 20, 30]; } } ILM Proprietary and Confidential - http: //www. ilmservice. com

If Statement using System; class Test { static void Main(string[] args) { if (args. Length == 0) Console. Write. Line("No arguments were provided"); else Console. Write. Line("Arguments were provided"); } } ILM Proprietary and Confidential - http: //www. ilmservice. com

Switch Statement using System; class Test{ static void Main(string[] args) { switch (args. Length) { case 0: Console. Write. Line("No arguments”); break; case 1: Console. Write. Line("One arguments”); break; default: Console. Write. Line("{0} arguments”); break; } } } ILM Proprietary and Confidential - http: //www. ilmservice. com

While Statement using System; class Test{ static int Find(int value, int[] arr) { int i = 0; while (arr[i] != value) { if (++i > arr. Length) throw new Argument. Exception(); } return i; } } ILM Proprietary and Confidential - http: //www. ilmservice. com

Do Statement using System; class Test { static void Main() { string s; do { s = Console. Read. Line(); } while (s != "Exit"); } } ILM Proprietary and Confidential - http: //www. ilmservice. com

For Statement using System; class Test { static void Main() { for (int i = 0; i < 10; i++) Console. Write. Line(i); } } ILM Proprietary and Confidential - http: //www. ilmservice. com

Foreach Statement using System; using System. Collections; class Test { static void Write. List(Array. List list) { foreach (object o in list) Console. Write. Line(o); } } ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Classes w w Used to declare reference types Single inheritance from other classes Multiple inheritance from interfaces Class members can include the following n n n Constants Fields, Methods, Properties, Indexers, Events Operators Constructors, destructors Nested Types ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Access Modifiers w Public Members are available to all code w Protrected Members are accessible only from derived classes w Internal Members are accessible only from within the same assembly w Protected Internal Members are accessible only from derived classes within the same assembly w Private Members are accessible only from the class itself ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Interfaces w Define a contract w Class that implements an interface must adhere to its contract w Interface members can consists of the following n n Methods Properties Indexers Events ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Properties public class Button: Control { private string caption; public string Caption { get { return caption; } set { caption = value; Repaint(); } } } ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Indexers public class List. Box: Control { private string[] items; public string this[int index] { get { return items[index]; } set { items[index] = value; Repaint(); } } } ILM Proprietary and Confidential - http: //www. ilmservice. com

OO Programming With C# n Exception Handling try { //try-statement: block of code } catch ( class-type identifieropt ) { //specific-catch-clauses: block of code } catch { //general-catch-clause: block of code } finally { // finally-clause: block of code } ILM Proprietary and Confidential - http: //www. ilmservice. com