C Sharp Web & Internet Programming Group Diana, Aren, Jeff, & Adam, Farrin 5/5/20081CS 311

 Anders Hejlsberg formed a team January 1999  Publicly announced July 2000  Third Version in June /5/20082CS 311

 Visual J++  Turbo Pascal  Based on Java  Delphi  Smalltalk  Based on C++  Visual Basic 5/5/20083CS 311

 Simple  General-purpose OOP  Ground up design  Components  High Level  Source code Portable  Compiled 5/5/20084CS 311

 Preprocessor directives  No Actual preprocessor  Symbols but no macros 5/5/20085CS 311

 Int  Long  Char  Float  Bool  Double  Byte  Word 5/5/20086CS 311

Type safety  Implicit conversions  Enumeration members are placed in their own namespace.  Type Reflection 5/5/20087CS 311

 C# supports a strict Boolean type, Bool  Conditionals  No 1=True  Easy conversion  If(a=b) mistake 5/5/20088CS 311

 New features  Can be cross-language  C++ templates can not  Type Constraints  No non-typed parameters 5/5/20089CS 311

 global variables  Methods and members  shadow variables  Similar to C++ and Java  Int A=1;  string B = Boo; 5/5/200810CS 311

 Similar to C++  If( Bool){}  While(Bool){} 5/5/200811CS 311  No Global functions  All method and member functions must be declared within classes

 C# pointers  Managed memory  Garbage collected 5/5/200812CS 311

 Similar to C++  class example_class { { // implementation } }  All methods and members  Multiple Inheritance 5/5/200813CS 311

5/5/200814CS 311  Allows class implementation across more than one source file.  file1.cs:  public partial class MyClass { public MyClass() { // implementation } }  file2.cs:  public partial class MyClass { public void SomeMethod() { // implementation } }

 Light weight classes  Allocated on stack 5/5/200815CS 311

 A dynamic linking library(s)  Shared Libraries 5/5/200816CS 311

 // File: Add.cs namespace UtilityMethods { public class AddClass { public static long Add(long i, long j) { return (i + j); } } }  namespace UtilityMethods { public class MultiplyClass { public static long Multiply(long x, long y) { return (x * y); } } } 5/5/200817CS 311

 // File: TestCode.cs using UtilityMethods; class TestCode { static void Main(string[] args) { System.Console.WriteLine ("Calling methods from MathLibrary.DLL:");  if (args.Length != 2) { System.Console.WriteLine("Usage: TestCode "); return; } long num1 = long.Parse(args[0]);  } } 5/5/200818CS 311

 New  int foo = 42; // Value type... object bar = foo; // foo is boxed to bar.  int foo = 42; // Value type. object bar = foo; // foo is boxed to bar. int foo2 = (int)bar; // Unboxed back to value type. 5/5/200819CS 311

 August 2000 Specs submitted + CLI  ISO Standard 2003  June 2005 third edition Approved 5/5/200820CS 311

 using System; // A "Hello World!" program in C# namespace Hello World { class Hello { static void Main() { System.Console.WriteLine("Hello World!"); } } } 5/5/200821CS 311

 //  /*  */  XML documentation 5/5/200822CS 311

.NET Only available on Windows  Greater resources required  Nonstandard classes 5/5/200823CS 311

   us/library/67ef8sbd(VS.80).aspx us/library/67ef8sbd(VS.80).aspx  us/vcsharp/aa aspx us/vcsharp/aa aspx  eStandards/c042926_ISO_IEC_23270_2006(E).z ip eStandards/c042926_ISO_IEC_23270_2006(E).z ip 5/5/200824CS 311

 New  file1.cs:  public partial class MyClass { public MyClass() { // implementation } }  file2.cs:  public partial class MyClass { public void SomeMethod() { // implementation } } 5/5/200825CS 311

 No Global functions  All method and member functions must be declared within classes 5/5/200826CS 311

 // Method that takes an iterable input (possibly an array) and returns all even numbers.  public static IEnumerable GetEven(IEnumerable numbers)  { foreach (int i in numbers) { if (i % 2 == 0) yield return i; } } 5/5/200827CS 311