.NET 2.0 and Visual Studio 2005

1
.NET 2.0 and Visual Studio 2005

• SigWin 2004

2
Outline

• Language enhancements in C
• Generics
• Partial types
• Anonymous methods
• Nullable types
• IDE features
• Intellisense
• Refractoring
• Code snippets
• Other awesome stuff!

3
Generics

• Motivation

4
Generics

• One method
• public int AddSeconds(ArrayList myList)
• int total0
• DateTime myDate
• foreach (object myObj in myList)
• myDate(DateTime) myObj
• totalmyDate.Second
• return total

5
Generics

• Other method is to derive your own collection
  class. Namespace is now cluttered with many
  strongly typed collections
• Answer to problem GENERICS!!!!!

6
Generics Example

• System.Collections.Generic
• private System.Collections.Generic.ListltDateTimegt
  myList
• private Dictionaryltstring, StackltDateTimegtgt
  myList

7
Generics old example
public int AddSeconds(ListltDateTimegt myList)
int total 0
foreach (DateTime myDate in myList)
total myDate.Second return
total
8
Partial types

• Easy way to separate automatically generated code
  from your own
• public partial class myClass
• public partial class myClass

9
Anonymous methods

• Review of delegates
• Anonymous delegatedelegate without a function
  name, just code

10
Anonymous method example
button1.Click delegate MessageBox.Show("Click
") Alternative button1.Clicknew
EventHandler(myButton1_Click) private void
myButton1_Click(object sender, EventArgs e)
MessageBox.Show(Click)
11
Nullable types

• Motivation
• Syntax

int? myInt null if
(myInt.HasValue)
//Do stuff here with myInt.Value
else
//It's null int? d1,
fnull Console.WriteLine(f ?? d)
12
Visual Studio 2005 IDE

• Demo!