in short, alot

A Programmers Introduction to Visual Basic .Net by Craig Utley has a full chapter dedicated to this.


Chapter Outline:
Code:
General Changes ....................................................................................49
Default Properties ............................................................................49
Subs and Functions Require Parentheses ........................................50
Changes to Boolean Operators ........................................................51
Declaration Changes ........................................................................52
Support for New Assignment Operators ..........................................52
ByVal Is Now the Default ................................................................53
Block-Level Scope ..........................................................................53
While...Wend Becomes While...End While ..................................54
Procedure Changes ..........................................................................54
Array Changes ..................................................................................57
Option Strict..................................................................................58
Data Type Changes ..........................................................................59
Structured Error Handling ................................................................62
Structures Replace UDTs ................................................................64
IDE Changes ....................................................................................66
New Items ..............................................................................................66
Constructors and Destructors ..........................................................66
Namespaces ......................................................................................67
Inheritance ........................................................................................69
Overloading ......................................................................................69
Free Threading..................................................................................70
Garbage Collection ..........................................................................72