[codepoet]

Hey guys.. here is a little info i found and thought i would share with you all.

---

--Program Structure

VB.NET

Code

Imports System

Namespace Hello
   Class HelloWorld
      Overloads Shared Sub Main(ByVal args() As String)
         Dim name As String = "VB.NET"

         'See if an argument was passed from the command line
          If args.Length = 1 Then name = args(0)

          Console.WriteLine("Hello, " & name & "!")
      End Sub
   End Class
End Namespace

C#

Code

using System;

namespace Hello {
   public class HelloWorld {
      public static void Main(string[] args) {
         string name = "C#";

         // See if an argument was passed from the command line
         if (args.Length == 1)
            name = args[0];

         Console.WriteLine("Hello, " + name + "!");
      }
   }
}

---

--Comments
VB.NET

Code

' Single line only REM Single line only
''' <summary>XML comments</summary>

C#

Code

// Single line
/* Multiple
    line  */
/// <summary>XML comments on single line</summary>
/** <summary>XML comments on multiple lines</summary> */

---

--Data Types

VB.NET

Code

Value Types
Boolean
Byte, SByte
Char
Short, UShort, Integer, UInteger, Long, ULong
Single, Double
Decimal
Date   (alias of System.DateTime)

Reference Types
Object
String
Initializing
Dim correct As Boolean = True
Dim b As Byte = &H2A   'hex or &O52 for octal
Dim person As Object = Nothing
Dim name As String = "Dwight"
Dim grade As Char = "B"c
Dim today As Date = #12/31/2007 12:15:00 PM#
Dim amount As Decimal = 35.99@
Dim gpa As Single = 2.9!
Dim pi As Double = 3.14159265
Dim lTotal As Long = 123456L
Dim sTotal As Short = 123S
Dim usTotal As UShort = 123US
Dim uiTotal As UInteger = 123UI
Dim ulTotal As ULong = 123UL

Implicitly Typed Local Variables
Dim s = "Hello!"
Dim nums = New Integer() {1, 2, 3}
Dim hero = New SuperHero With {.Name = "Batman"}

Type Information
Dim x As Integer
Console.WriteLine(x.GetType())          ' Prints System.Int32
Console.WriteLine(GetType(Integer))   ' Prints System.Int32
Console.WriteLine(TypeName(x))        ' Prints Integer

Dim c as New Circle
If TypeOf c Is Shape Then _
    Console.WriteLine("c is a Shape")
Type Conversion / Casting
Dim d As Single = 3.5
Dim i As Integer = CType(d, Integer)   ' set to 4 (Banker's rounding)
i = CInt(d)  ' same result as CType
i = Int(d)    ' set to 3 (Int function truncates the decimal)

Dim o As Object = 2
i = DirectCast(o, Integer)   ' Throws InvalidCastException if type cast fails

Dim s As New Shape
Dim c As Circle = TryCast(s, Circle)   ' Returns Nothing if type cast fails

C#

Code

Value Types
bool
byte, sbyte
char
short, ushort, int, uint, long, ulong
float, double
decimal
DateTime   (not a built-in C# type)

Reference Types
object
string
Initializing
bool correct = true;
byte b = 0x2A;   // hex
object person = null;
string name = "Dwight";
char grade = 'B';
DateTime today = DateTime.Parse("12/31/2007 12:15:00");
decimal amount = 35.99m;
float gpa = 2.9f;
double pi = 3.14159265;
long lTotal = 123456L;
short sTotal = 123;
ushort usTotal = 123;
uint uiTotal = 123;
ulong ulTotal = 123;
Implicitly Typed Local Variables
var s = "Hello!";
var nums = new int[] { 1, 2, 3 };
var hero = new SuperHero() { Name = "Batman" };

Type Information
int x;
Console.WriteLine(x.GetType());              // Prints System.Int32
Console.WriteLine(typeof(int));               // Prints System.Int32
Console.WriteLine(x.GetType().Name);   // prints Int32

Circle c = new Circle();
if (c is Shape)
    Console.WriteLine("c is a Shape");
Type Conversion / Casting
float d = 3.5f;
i = Convert.ToInt32(d);     // Set to 4 (rounds)
int i = (int)d;     // set to 3 (truncates decimal)    


object o = 2;
int i = (int)o;   // Throws InvalidCastException if type cast fails

Shape s = new Shape();
Circle c = s as Circle;   // Returns null if type cast fails

---

--Constants
VB.NET

Code

onst MAX_STUDENTS As Integer = 25
' Can set to a const or var; may be initialized in a constructor
ReadOnly MIN_DIAMETER As Single = 4.93

C#

Code

const int MAX_STUDENTS = 25;
// Can set to a const or var; may be initialized in a constructor
readonly float MIN_DIAMETER = 4.93f;

---

--Enumerations

VB.NET

Code

Enum Action
  Start
  [Stop]   ' Stop is a reserved word
  Rewind
  Forward
End Enum

Enum Status
  Flunk = 50
  Pass = 70
  Excel = 90
End Enum

Dim a As Action = Action.Stop
If a <> Action.Start Then _
   Console.WriteLine(a.ToString & " is " & a)     ' Prints "Stop is 1"

Console.WriteLine(Status.Pass)     ' Prints 70
Console.WriteLine(Status.Pass.ToString())     ' Prints Pass

C#

Code

enum Action {Start, Stop, Rewind, Forward};
enum Status {Flunk = 50, Pass = 70, Excel = 90};

Action a = Action.Stop;
if (a != Action.Start)
  Console.WriteLine(a + " is " + (int) a);    // Prints "Stop is 1"

Console.WriteLine((int) Status.Pass);    // Prints 70
Console.WriteLine(Status.Pass);      // Prints Pass

---

--Operators

VB.NET

Code

Comparison
=  <  >  <=  >=  <>

Arithmetic
+  -  *  /
Mod
\  (integer division)
^  (raise to a power)

Assignment
=  +=  -=  *=  /=  \=  ^=  <<=  >>=  &=

Bitwise
And   Or   Xor   Not   <<   >>

Logical
AndAlso   OrElse   And   Or   Xor   Not

Note: AndAlso and OrElse perform short-circuit logical evaluations

String Concatenation
&

C#

Code

Comparison
==  <  >  <=  >=  !=

Arithmetic
+  -  *  /
%  (mod)
/  (integer division if both operands are ints)
Math.Pow(x, y)

Assignment
=  +=  -=  *=  /=   %=  &=  |=  ^=  <<=  >>=  ++  --

Bitwise
&   |   ^   ~   <<   >>

Logical
&&   ||   &   |   ^   !

Note: && and || perform short-circuit logical evaluations

String Concatenation
+

---

--Choices

VB.NET

Code

' Ternary/Conditional operator (Iff evaluates 2nd and 3rd expressions)
greeting = If(age < 20, "What's up?", "Hello")

' One line doesn't require "End If"
If age < 20 Then greeting = "What's up?"
If age < 20 Then greeting = "What's up?" Else greeting = "Hello"

' Use : to put two commands on same line
If x <> 100 AndAlso y < 5 Then x *= 5 : y *= 2  

' Preferred
If x <> 100 AndAlso y < 5 Then
  x *= 5
  y *= 2
End If

' To break up any long single line use _
If whenYouHaveAReally < longLine And _
  itNeedsToBeBrokenInto2 > Lines Then _
  UseTheUnderscore(charToBreakItUp)

'If x > 5 Then
  x *= y
ElseIf x = 5 OrElse y Mod 2 = 0 Then
  x += y
ElseIf x < 10 Then
  x -= y
Else
  x /= y
End If

Select Case color   ' Must be a primitive data type
  Case "pink", "red"
    r += 1
  Case "blue"
    b += 1
  Case "green"
    g += 1
  Case Else
    other += 1
End Select

C#

Code

// Ternary/Conditional operator
greeting = age < 20 ? "What's up?" : "Hello";

if (age < 20)
  greeting = "What's up?";
else
  greeting = "Hello";

// Multiple statements must be enclosed in {}
if (x != 100 && y < 5) {  
  x *= 5;
  y *= 2;
}



No need for _ or : since ; is used to terminate each statement.





if (x > 5)
  x *= y;
else if (x == 5 || y % 2 == 0)
  x += y;
else if (x < 10)
  x -= y;
else
  x /= y;


// Every case must end with break or goto case
switch (color) {                          // Must be integer or string
  case "pink":
  case "red":    r++;    break;
  case "blue":   b++;   break;
  case "green": g++;   break;
  default:    other++;   break;       // break necessary on default
}

---

---

--Namespaces

VB.NET

Code

Namespace Harding.Compsci.Graphics
  ...
End Namespace

' or

Namespace Harding
  Namespace Compsci
    Namespace Graphics
  ...
    End Namespace
  End Namespace
End Namespace

Imports Harding.Compsci.Graphics

C#

Code

namespace Harding.Compsci.Graphics {
  ...
}

// or

namespace Harding {
  namespace Compsci {
    namespace Graphics {
  ...
    }
  }
}

using Harding.Compsci.Graphics;

---

--Classes / Interfaces

VB.NET

Code

Access Modifiers
Public
Private
Friend
Protected
Protected Friend
Class Modifiers
MustInherit
NotInheritable

Method Modifiers
MustOverride
NotInheritable
Shared
Overridable
' All members are Shared
Module

' Partial classes
Partial Class Competition
  ...
End Class

' Inheritance
Class FootballGame
  Inherits Competition
  ...
End Class

' Interface definition
Interface IAlarmClock
  ...
End Interface

// Extending an interface
Interface IAlarmClock
  Inherits IClock
  ...
End Interface

// Interface implementation
Class WristWatch
  Implements IAlarmClock, ITime
   ...
End Class

C#

Code

Access Modifiers
public
private
internal
protected
protected internal
Class Modifiers
abstract
sealed
static
Method Modifiers
abstract
sealed
static
virtual
No Module equivalent - just use static class

// Partial classes
partial class Competition {
  ...
}

// Inheritance
class FootballGame : Competition {
  ...
}

// Interface definition
interface IAlarmClock {
  ...
}

// Extending an interface
interface IAlarmClock : IClock {
  ...
}

// Interface implementation
class WristWatch : IAlarmClock, ITimer {
   ...
}

---

--Constructors / Destructors

VB.NET

Code

Class SuperHero
  Private powerLevel As Intege

  Public Sub New()
    powerLevel = 0
  End Sub

  Public Sub New(ByVal powerLevel As Integer)
    Me.powerLevel = powerLevel
  End Sub

  Shared Sub New()
    ' Shared constructor invoked before 1st instance is created
  End Sub

  Protected Overrides Sub Finalize()
   ' Destructor to free unmanaged resources
    MyBase.Finalize()
  End Sub
End Class

C#

Code

class SuperHero {
  private int powerLevel;

  public SuperHero() {
  powerLevel = 0;
  }

  public SuperHero(int powerLevel) {
    this.powerLevel = powerLevel;
  }

  static SuperHero() {
    // Static constructor invoked before 1st instance is created
  }

  ~SuperHero() {
    // Destructor implicitly creates a Finalize method
  }
}

---

--Loops

VB.NET

Code

Pre-test Loops:
While c < 10
  c += 1
End While    
Do Until c = 10
  c += 1
Loop

Do While c < 10
  c += 1
Loop    
For c = 2 To 10 Step 2
  Console.WriteLine(c)
Next

Post-test Loops:
Do
  c += 1
Loop While c < 10    Do
  c += 1
Loop Until c = 10
'  Array or collection looping
Dim names As String() = {"Fred", "Sue", "Barney"}
For Each s As String In names
  Console.WriteLine(s)
Next

' Breaking out of loops
Dim i As Integer = 0
While (True)
  If (i = 5) Then Exit While
  i += 1
End While

' Continue to next iteration
For i = 0 To 4
  If i < 4 Then Continue For
  Console.WriteLine(i)   ' Only prints 4
Next

C#

Code

Pre-test Loops:  
// no "until" keyword
while (c < 10)
  c++;

for (c = 2; c <= 10; c += 2)
  Console.WriteLine(c);

Post-test Loop:

do
  c++;
while (c < 10);

// Array or collection looping
string[] names = {"Fred", "Sue", "Barney"};
foreach (string s in names)
  Console.WriteLine(s);

// Breaking out of loops
int i = 0;
while (true) {
  if (i == 5)
    break;
  i++;
}

// Continue to next iteration
for (i = 0; i <= 4; i++) {
  if (i < 4)
    continue;
  Console.WriteLine(i);   // Only prints 4
}

---

--Arrays

VB.NET

Code

Dim nums() As Integer = {1, 2, 3}
For i As Integer = 0 To nums.Length - 1
  Console.WriteLine(nums(i))
Next

' 4 is the index of the last element, so it holds 5 elements
Dim names(4) As String
names(0) = "David"
names(5) = "Bobby"  ' Throws System.IndexOutOfRangeException

' Resize the array, keeping the existing values (Preserve is optional)
ReDim Preserve names(6)

Dim twoD(rows-1, cols-1) As Single
twoD(2, 0) = 4.5

Dim jagged()() As Integer = { _
  New Integer(4) {}, New Integer(1) {}, New Integer(2) {} }
jagged(0)(4) = 5

C#

Code

int[] nums = {1, 2, 3};
for (int i = 0; i < nums.Length; i++)
  Console.WriteLine(nums[i]);

// 5 is the size of the array
string[] names = new string[5];
names[0] = "David";
names[5] = "Bobby";   // Throws System.IndexOutOfRangeException

// C# can't dynamically resize an array.  Just copy into new array.
string[] names2 = new string[7];
Array.Copy(names, names2, names.Length);   // or names.CopyTo(names2, 0);

float[,] twoD = new float[rows, cols];
twoD[2,0] = 4.5f;

int[][] jagged = new int[3][] {
  new int[5], new int[2], new int[3] };
jagged[0][4] = 5;

---

--Functions

VB.NET

Code

' Pass by value (in, default), reference (in/out), and reference (out)  
Sub TestFunc(ByVal x As Integer, ByRef y As Integer, ByRef z As Integer)
  x += 1
  y += 1
  z = 5
End Sub

Dim a = 1, b = 1, c As Integer   ' c set to zero by default  
TestFunc(a, b, c)
Console.WriteLine("{0} {1} {2}", a, b, c)   ' 1 2 5

' Accept variable number of arguments
Function Sum(ByVal ParamArray nums As Integer()) As Intege
  Sum = 0  
  For Each i As Integer In nums
    Sum += i
  Next
End Function   ' Or use Return statement like C#

Dim total As Integer = Sum(4, 3, 2, 1)   ' returns 10

' Optional parameters must be listed last and must have a default value
Sub SayHello(ByVal name As String, Optional ByVal prefix As String = "")
  Console.WriteLine("Greetings, " & prefix & " " & name)
End Sub

SayHello("Strangelove", "Dr.")
SayHello("Mom")

C#

Code

// Pass by value (in, default), reference (in/out), and reference (out)
void TestFunc(int x, ref int y, out int z) {
  x++;  
  y++;
  z = 5;
}
int a = 1, b = 1, c;  // c doesn't need initializing
TestFunc(a, ref b, out c);
Console.WriteLine("{0} {1} {2}", a, b, c);  // 1 2 5

// Accept variable number of arguments
int Sum(params int[] nums) {
  int sum = 0;
  foreach (int i in nums)
    sum += i;
  return sum;
}

int total = Sum(4, 3, 2, 1);   // returns 10

/* C# 4.0 supports optional parameters. Previous versions required function overloading. */  
void SayHello(string name, string prefix = "") {
  Console.WriteLine("Greetings, " + prefix + " " + name);
}

SayHello("Strangelove", "Dr.");
SayHello("Mom");

---

--Strings

VB.NET

Code

Special character constants (all also accessible from ControlChars class)
vbCrLf, vbCr, vbLf, vbNewLine
vbNullString
vbTab
vbBack
vbFormFeed
vbVerticalTab
""

' String concatenation (use & or +)
Dim school As String = "Harding" & vbTab
school = school & "University" ' school is "Harding (tab) University"

' Chars
Dim letter As Char = school.Chars(0)   ' letter is H
letter = "Z"c     ' letter is Z
letter = Convert.ToChar(65)    ' letter is A
letter = Chr(65)     ' same thing
Dim word() As Char = school.ToCharArray() ' word holds Harding

' No string literal operato
Dim msg As String = "File is c:\temp\x.dat"

' String comparison
Dim mascot As String = "Bisons"
If (mascot = "Bisons") Then   ' true
If (mascot.Equals("Bisons")) Then   ' true
If (mascot.ToUpper().Equals("BISONS")) Then  ' true
If (mascot.CompareTo("Bisons") = 0) Then   ' true

' String matching with Like - Regex is more powerful
If ("John 3:16" Like "Jo[Hh]? #:*") Then   'true

' Substring
s = mascot.Substring(2, 3)) ' s is "son"

' Replacement
s = mascot.Replace("sons", "nomial")) ' s is "Binomial"

' Split
Dim names As String = "Michael,Dwight,Jim,Pam"
Dim parts() As String = names.Split(",".ToCharArray())   ' One name in each slot

' Date to string
Dim dt As New DateTime(1973, 10, 12)
Dim s As String = "My birthday: " & dt.ToString("MMM dd, yyyy")   ' Oct 12, 1973

' Integer to String
Dim x As Integer = 2
Dim y As String = x.ToString()  ' y is "2"

' String to Integer
Dim x As Integer = Convert.ToInt32("-5")  ' x is -5

' Mutable string
Dim buffer As New System.Text.StringBuilder("two ")
buffer.Append("three ")
buffer.Insert(0, "one ")
buffer.Replace("two", "TWO")
Console.WriteLine(buffer)  ' Prints "one TWO three"

C#

Code

Escape sequences
\r    // carriage-return
\n    // line-feed
\t    // tab
\\    // backslash
\"    // quote

// String concatenation
string school = "Harding\t";
school = school + "University";   // school is "Harding (tab) University"

// Chars
char letter = school[0];    // letter is H
letter = 'Z';     // letter is Z
letter = Convert.ToChar(65);  // letter is A
letter = (char)65;    // same thing
char[] word = school.ToCharArray();   // word holds Harding

// String literal
string msg = @"File is c:\temp\x.dat";
// same as
string msg = "File is c:\\temp\\x.dat";
// String comparison
string mascot = "Bisons";
if (mascot == "Bisons")    // true
if (mascot.Equals("Bisons"))   // true
if (mascot.ToUpper().Equals("BISONS"))   // true
if (mascot.CompareTo("Bisons") == 0)    // true

// String matching - No Like equivalent, use Regex

// Substring
s = mascot.Substring(2, 3))  // s is "son"

// Replacement
s = mascot.Replace("sons", "nomial"))  // s is "Binomial"

// Split
string names = "Michael,Dwight,Jim,Pam";
string[] parts = names.Split(",".ToCharArray());   // One name in each slot

// Date to string
DateTime dt = new DateTime(1973, 10, 12);
string s = dt.ToString("MMM dd, yyyy");  // Oct 12, 1973

// int to string
int x = 2;
string y = x.ToString();  // y is "2"

// string to int
int x = Convert.ToInt32("-5");  // x is -5
// Mutable string
System.Text.StringBuilder buffer = new System.Text.StringBuilder("two ");
buffer.Append("three ");
buffer.Insert(0, "one ");
buffer.Replace("two", "TWO");
Console.WriteLine(buffer);  // Prints "one TWO three"

---

--Regular Expressions

Code

VB.NET
Imports System.Text.RegularExpressions

' Match a string pattern
Dim r As New Regex("j[aeiou]h?. \d:*", RegexOptions.IgnoreCase Or _
  RegexOptions.Compiled)
If (r.Match("John 3:16").Success) Then   'true
    Console.WriteLine("Match")
End If

' Find and remember all matching patterns
Dim s As String = "My number is 305-1881, not 305-1818."
Dim r As New Regex("(\d+-\d+)")
Dim m As Match = r.Match(s)  ' Matches 305-1881 and 305-1818
While m.Success
    Console.WriteLine("Found number: " & m.Groups(1).Value & " at position " _
    & m.Groups(1).Index.ToString)
    m = m.NextMatch()
End While

' Remeber multiple parts of matched pattern
Dim r As New Regex("(\d\d):(\d\d) (am|pm)")
Dim m As Match = r.Match("We left at 03:15 pm.")
If m.Success Then
    Console.WriteLine("Hour: " & m.Groups(1).ToString)  ' 03
    Console.WriteLine("Min: " & m.Groups(2).ToString)  ' 15
    Console.WriteLine("Ending: " & m.Groups(3).ToString)   ' pm
End If

' Replace all occurrances of a pattern
Dim r As New Regex("h\w+?d", RegexOptions.IgnoreCase)
Dim s As String = r.Replace("I heard this was HARD!", "easy")   ' I easy this was easy!

' Replace matched patterns
Dim s As String = Regex.Replace("123 < 456", "(\d+) . (\d+)", "$2 > $1")   ' 456 > 123

' Split a string based on a pattern
Dim names As String = "Michael, Dwight, Jim, Pam"
Dim r As New Regex(",\s*")
Dim parts() As String = r.Split(names)   ' One name in each slot

C#

Code

using System.Text.RegularExpressions;

// Match a string pattern
Regex r = new Regex(@"j[aeiou]h?. \d:*", RegexOptions.IgnoreCase |
  RegexOptions.Compiled);
if (r.Match("John 3:16").Success)   // true
    Console.WriteLine("Match");

// Find and remember all matching patterns
string s = "My number is 305-1881, not 305-1818.";
Regex r = new Regex("(\\d+-\\d+)");
// Matches 305-1881 and 305-1818
for (Match m = r.Match(s); m.Success; m = m.NextMatch())
    Console.WriteLine("Found number: " + m.Groups[1] + " at position " +
  m.Groups[1].Index);

// Remeber multiple parts of matched pattern
Regex r = new Regex("@(\d\d):(\d\d) (am|pm)");
Match m = r.Match("We left at 03:15 pm.");
if (m.Success) {
    Console.WriteLine("Hour: " + m.Groups[1]);  // 03
    Console.WriteLine("Min: " + m.Groups[2]);  // 15
    Console.WriteLine("Ending: " + m.Groups[3]);   // pm
}

// Replace all occurrances of a pattern
Regex r = new Regex("h\\w+?d", RegexOptions.IgnoreCase);
string s = r.Replace("I heard this was HARD!", "easy"));   // I easy this was easy!

// Replace matched patterns
string s = Regex.Replace("123 < 456", @"(\d+) . (\d+)", "$2 > $1");   // 456 > 123

// Split a string based on a pattern
string names = "Michael, Dwight, Jim, Pam";
Regex r = new Regex(@",\s*");
string[] parts = r.Split(names);   // One name in each slot

---

---

--Exception Handling

VB.NET

Code

' Throw an exception
Dim ex As New Exception("Something is really wrong.")
Throw  ex

' Catch an exception
Try
  y = 0
  x = 10 / y
Catch ex As Exception When y = 0 ' Argument and When is optional
  Console.WriteLine(ex.Message)
Finally
  Beep()
End Try

' Deprecated unstructured error handling
On Error GoTo MyErrorHandler
...
MyErrorHandler: Console.WriteLine(Err.Description)

C#

Code

// Throw an exception
Exception up = new Exception("Something is really wrong.");
throw up;  // ha ha

// Catch an exception
try {
  y = 0;
  x = 10 / y;
}
catch (Exception ex) {   // Argument is optional, no "When" keyword
  Console.WriteLine(ex.Message);
}
finally {
  Microsoft.VisualBasic.Interaction.Beep();
}

---

--Using Objects

VB.NET

Code

Dim hero As SuperHero = New SuperHero
' or
Dim hero As New SuperHero

With hero
  .Name = "SpamMan"
  .PowerLevel = 3
End With
hero.Defend("Laura Jones")
hero.Rest()  ' Calling Shared method
' or
SuperHero.Rest()

Dim hero2 As SuperHero = hero  ' Both reference the same object
hero2.Name = "WormWoman"
Console.WriteLine(hero.Name)   ' Prints WormWoman

hero = Nothing    ' Free the object

If hero Is Nothing Then _
  hero = New SuperHero

Dim obj As Object = New SuperHero
If TypeOf obj Is SuperHero Then _
  Console.WriteLine("Is a SuperHero object.")

' Mark object for quick disposal
Using reader As StreamReader = File.OpenText("test.txt")
  Dim line As String = reader.ReadLine()
  While Not line Is Nothing
    Console.WriteLine(line)
    line = reader.ReadLine()
  End While
End Using

C#

Code

SuperHero hero = new SuperHero();

// No "With" construct
hero.Name = "SpamMan";
hero.PowerLevel = 3;

hero.Defend("Laura Jones");
SuperHero.Rest();   // Calling static method

SuperHero hero2 = hero;   // Both reference the same object
hero2.Name = "WormWoman";
Console.WriteLine(hero.Name);   // Prints WormWoman

hero = null ;   // Free the object

if (hero == null)
  hero = new SuperHero();

Object obj = new SuperHero();
if (obj is SuperHero)
  Console.WriteLine("Is a SuperHero object.");

// Mark object for quick disposal
using (StreamReader reader = File.OpenText("test.txt")) {
  string line;
  while ((line = reader.ReadLine()) != null)
    Console.WriteLine(line);
}

---

--Structs

VB.NET

Code

Structure StudentRecord
  Public name As String
  Public gpa As Single

  Public Sub New(ByVal name As String, ByVal gpa As Single)
    Me.name = name
    Me.gpa = gpa
  End Sub
End Structure

Dim stu As StudentRecord = New StudentRecord("Bob", 3.5)
Dim stu2 As StudentRecord = stu  

stu2.name = "Sue"
Console.WriteLine(stu.name)    ' Prints Bob
Console.WriteLine(stu2.name)  ' Prints Sue

C#

Code

struct StudentRecord {
  public string name;
  public float gpa;

  public StudentRecord(string name, float gpa) {
    this.name = name;
    this.gpa = gpa;
  }
}
StudentRecord stu = new StudentRecord("Bob", 3.5f);
StudentRecord stu2 = stu;  

stu2.name = "Sue";
Console.WriteLine(stu.name);    // Prints Bob
Console.WriteLine(stu2.name);   // Prints Sue

---

--Properties

VB.NET

Code

' Auto-implemented properties are new to VB10
Public Property Name As String
Public Property Size As Integer = -1  ' Default value, Get and Set both Public
' Traditional property implementation
Private mName As String
Public Property Name() As String
    Get
  Return mName
    End Get
    Set(ByVal value As String)
  mName = value
    End Set
End Property

' Read-only property
Private mPowerLevel As Integer
Public ReadOnly Property PowerLevel() As Integer
    Get
  Return mPowerLevel
    End Get
End Property

' Write-only property
Private mHeight As Double
Public WriteOnly Property Height() As Double
    Set(ByVal value As Double)
  mHeight = If(value < 0, mHeight = 0, mHeight = value)
    End Set
End Property

C#

Code

// Auto-implemented properties
public string Name { get; set; }
public int Size { get; protected set; }  // Set default value in constructo
// Traditional property implementation
private string name;
public string Name {
  get {
    return name;
  }
  set {
    name = value;
  }
}

// Read-only property
private int powerLevel;
public int PowerLevel {
  get {
    return powerLevel;
  }
}

// Write-only property
private double height;
public double Height {
  set {
    height = value < 0 ? 0 : value;
  }
}

---

--Delegates / Events

VB.NET

Code

Delegate Sub MsgArrivedEventHandler(ByVal message As String)

Event MsgArrivedEvent As MsgArrivedEventHandler

' or to define an event which declares a delegate implicitly
Event MsgArrivedEvent(ByVal message As String)

AddHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback
' Won't throw an exception if obj is Nothing
RaiseEvent MsgArrivedEvent("Test message")
RemoveHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback
Imports System.Windows.Forms

Dim WithEvents MyButton As Button   ' WithEvents can't be used on local variable
MyButton = New Button

Private Sub MyButton_Click(ByVal sender As System.Object, _
  ByVal e As System.EventArgs) Handles MyButton.Click
  MessageBox.Show(Me, "Button was clicked", "Info", _
    MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub

C#

Code

delegate void MsgArrivedEventHandler(string message);

event MsgArrivedEventHandler MsgArrivedEvent;

// Delegates must be used with events in C#

MsgArrivedEvent += new MsgArrivedEventHandler(My_MsgArrivedEventCallback);
MsgArrivedEvent("Test message");    // Throws exception if obj is null
MsgArrivedEvent -= new MsgArrivedEventHandler(My_MsgArrivedEventCallback);

using System.Windows.Forms;

Button MyButton = new Button();
MyButton.Click += new System.EventHandler(MyButton_Click);

private void MyButton_Click(object sender, System.EventArgs e) {
  MessageBox.Show(this, "Button was clicked", "Info",
    MessageBoxButtons.OK, MessageBoxIcon.Information);
}

---

--Generics

VB.NET

Code

' Enforce accepted data type at compile-time
Dim numbers As New List(Of Integer)
numbers.Add(2)
numbers.Add(4)
DisplayList(Of Integer)(numbers)
' Subroutine can display any type of List
Sub DisplayList(Of T)(ByVal list As List(Of T))
    For Each item As T In list
  Console.WriteLine(item)
    Next
End Sub
'    Class works on any data type
Class SillyList(Of T)
    Private list(10) As T
    Private rand As New Random

    Public Sub Add(ByVal item As T)
  list(rand.Next(10)) = item
    End Sub

    Public Function GetItem() As T
  Return list(rand.Next(10))
    End Function
End Class
' Limit T to only types that implement IComparable
Function Maximum(Of T As IComparable)(ByVal ParamArray items As T()) As T
    Dim max As T = items(0)
    For Each item As T In items
  If item.CompareTo(max) > 0 Then max = item
    Next
    Return max
End Function

C#

Code

// Enforce accepted data type at compile-time
List<int> numbers = new List<int>();
numbers.Add(2);
numbers.Add(4);
DisplayList<int>(numbers);
// Function can display any type of List
void DisplayList<T>(List<T> list) {
    foreach (T item in list)
  Console.WriteLine(item);
}

// Class works on any data type
class SillyList<T> {
    private T[] list = new T[10];
    private Random rand = new Random();

    public void Add(T item) {
  list[rand.Next(10)] = item;
    }

    public T GetItem() {
  return list[rand.Next(10)];
    }
}
// Limit T to only types that implement IComparable
T Maximum<T>(params T[] items) where T : IComparable<T> {
    T max = items[0];
    foreach (T item in items)
  if (item.CompareTo(max) > 0)
    max = item;
    return max;
}

---

--LINQ

VB.NET

Code

Dim nums() As Integer = {5, 8, 2, 1, 6}

' Get all numbers in the array above 4
Dim results = From value In nums
    Where value > 4
    Select value

Console.WriteLine(results.Count())  ' 3
Console.WriteLine(results.First())  ' 5
Console.WriteLine(results.Last())  ' 6
Console.WriteLine(results.Average())  ' 6.33

' Displays 5 8 6
For Each n As Integer In results
    Console.Write(n & " ")
Next

results = results.Intersect({5, 6, 7})  ' 5 6
results = results.Concat({5, 1, 5})  ' 5 6 5 1 5
results = results.Distinct()  ' 5 6 1

Dim Students() As Student = {
    New Student With {.Name = "Bob", .GPA = 3.5},
    New Student With {.Name = "Sue", .GPA = 4.0},
    New Student With {.Name = "Joe", .GPA = 1.9}
}

' Get an ordered list of all students by GPA with GPA >= 3.0
Dim goodStudents = From s In Students
    Where s.GPA >= 3.0
    Order By s.GPA Descending
    Select s

Console.WriteLine(goodStudents.First.Name)  ' Sue

C#

Code

int[] nums = { 5, 8, 2, 1, 6 };

// Get all numbers in the array above 4
var results = from value in nums
    where value > 4
    select value;

Console.WriteLine(results.Count());  // 3
Console.WriteLine(results.First());  // 5
Console.WriteLine(results.Last());  // 6
Console.WriteLine(results.Average());  // 6.33

// Displays 5 8 6
foreach (int n in results)
    Console.Write(n + " ");

results = results.Intersect(new[] {5, 6, 7});  // 5 6
results = results.Concat(new[] {5, 1, 5});  // 5 6 5 1 5
results = results.Distinct();  // 5 6 1

Student[] Students = {
    new Student{ Name = "Bob", GPA = 3.5 },
    new Student{ Name = "Sue", GPA = 4.0 },
    new Student{ Name = "Joe", GPA = 1.9 }
};

// Get an ordered list of all students by GPA with GPA >= 3.0
var goodStudents = from s in Students
    where s.GPA >= 3.0
    orderby s.GPA descending
    select s;

Console.WriteLine(goodStudents.First().Name);  // Sue

---

--Console I/O

VB.NET

Code

Console.Write("What's your name? ")
Dim name As String = Console.ReadLine()
Console.Write("How old are you? ")
Dim age As Integer = Val(Console.ReadLine())
Console.WriteLine("{0} is {1} years old.", name, age)  
' o
Console.WriteLine(name & " is " & age & " years old.")

Dim c As Intege
c = Console.Read()    ' Read single cha
Console.WriteLine(c)   ' Prints 65 if user enters "A"

C#

Code

Console.Write("What's your name? ");
string name = Console.ReadLine();
Console.Write("How old are you? ");
int age = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0} is {1} years old.", name, age);
// or
Console.WriteLine(name + " is " + age + " years old.");

int c = Console.Read();  // Read single char
Console.WriteLine(c);    // Prints 65 if user enters "A"

---

--File I/O

VB.NET

Code

Imports System.IO

' Write out to text file
Dim writer As StreamWriter = File.CreateText("c:\myfile.txt")
writer.WriteLine("Out to file.")
writer.Close()

' Read all lines from text file
Dim reader As StreamReader = File.OpenText("c:\myfile.txt")
Dim line As String = reader.ReadLine()
While Not line Is Nothing
  Console.WriteLine(line)
  line = reader.ReadLine()
End While
reader.Close()

' Write out to binary file
Dim str As String = "Text data"
Dim num As Integer = 123
Dim binWriter As New BinaryWriter(File.OpenWrite("c:\myfile.dat"))  
binWriter.Write(str)  
binWriter.Write(num)
binWriter.Close()

' Read from binary file
Dim binReader As New BinaryReader(File.OpenRead("c:\myfile.dat"))
str = binReader.ReadString()
num = binReader.ReadInt32()
binReader.Close()

C#

Code

using System.IO;

// Write out to text file
StreamWriter writer = File.CreateText("c:\\myfile.txt");
writer.WriteLine("Out to file.");
writer.Close();

// Read all lines from text file
StreamReader reader = File.OpenText("c:\\myfile.txt");
string line = reader.ReadLine();
while (line != null) {
  Console.WriteLine(line);
  line = reader.ReadLine();
}
reader.Close();

// Write out to binary file
string str = "Text data";
int num = 123;
BinaryWriter binWriter = new BinaryWriter(File.OpenWrite("c:\\myfile.dat"));
binWriter.Write(str);
binWriter.Write(num);
binWriter.Close();

// Read from binary file
BinaryReader binReader = new BinaryReader(File.OpenRead("c:\\myfile.dat"));
str = binReader.ReadString();
num = binReader.ReadInt32();
binReader.Close();

--
PLEASE COMMENT AND RATE THIS THREAD... IT TOOK ME 2 DAYS TO PREPARE THIS.

::::>[MyForum]<::::

--

-Crow407

[.Sugar]

Dude this is an amazing thread! You really put allot of effort into this. 0_0 IMO I prefer C# It's just what I'm use to.

[H3x0S]

http://tutorialsto.com/index.php/dotnet/...anual.html

It took you 3 minutes to leech it.

[Meron95]

http://tutorialsto.com/index.php/dotnet/...anual.html

It took you 3 minutes to leech it.

agree
leeching is not appropriate. sr dude. at least give credits

[codepoet]

LIKE I SAID ON THE END OF THE THREAD...

IT TOOK ME 2 DAYS TO PREPARE THIS. NOT WRITE IT!

[codepoet]

It took you 2 days to CTRL+C and CTRL+V? You must be a fucking moron..

This is verbatim from http://tutorialsto.com/index.php/dotnet/...anual.html

Thanks for flaming me. i tested each method to make sure everything worked before i posted to avoid flamers like your self.

[Maneuver]

long story short C# is better

[codepoet]

long story short C# is better

I agree yet... i still need to learn C# because i started out with vb.net and that was the worst choice i have made in programming yet.

[This Girl Is On Fire]

Tested each method. Load of shit. If you give credits you don't need to be responsible for flaming.

---

Tested each method. Load of shit. If you give credits you don't need to be responsible for mistakes.

[codepoet]

Thanks for the flaming... please press the red square located on the top right side of your browser to receive a cookie.

[affixiate]

I like how you linked to your forum, but not to the place where you found this.

Who cares if you tested it for 2 days; you still took it from a website (it isn't your own work). Go edit your post and put the source in there. It's only fair.

[codepoet]

I cant edit the thread because it has to much written and the server wont allow!!

---

/REQ Thread Close

please..