This document discusses .NET framework versions and new features in .NET 4.5. It notes that .NET 4.5 installs as an in-place update replacing .NET 4. It also describes new features of .NET 4.5 including support for Windows Store apps, asynchronous programming with async and await, and portable class libraries.

1. 蔡孟儒
技術推廣協理
台灣微軟技術暨平台推廣處

4. WHY Change? 在趨勢的演進中拉距

6. .NET 簡史以及相容性

7. 橫線上的較新版本皆為in-place updates (就地更新)
.NET 4.5 於安裝時取代
.NET 4 .NET 4.5 .NET 4 (或升級
Windows 8時)
.NET 2.0 .NET 3.0 .NET 3.5 .NET 4 仍可在Visual
Studio 2012 中設為目
標Framework
.NET 1.1
.NET 1.0
2002 2003 2005 2008 2010 2012

8. Migration Guide to the .NET Framework 4.5:
http://msdn.microsoft.com/en-us/library/ff657133(v=VS.110).aspx
Application Compatibility in the .NET Framework 4.5
http://msdn.microsoft.com/en-us/library/hh367887(v=VS.110).aspx

9. http://msdn.microsoft.com/en-us/library/hh266747(VS.110).aspx

10. .NET 4.5 重要特色
.NET for Windows 市集應用程式

12. Desktop

17. C#版的WinRT App…

18. ECMA 335

20. DllImport "avicap32.dll" "capCreateCaptureWindow"
static extern int
string int
int int int int
int int
DllImport "avicap32.dll"
static extern bool
int
MarshalAs UnmanagedType ref string
int
MarshalAs UnmanagedType ref string
int
// more and more of the same

21. using Windows.Media.Capture;
var new CameraCaptureUI
new Size
var await CameraCaptureUIMode
if
var new BitmapImage
await FileAccessMode

22. http://software.intel.com/en-us/articles/using-winrt-apis-from-desktop-applications

23. Async & Await

24. var
var

25. .NET 以往處理非同步運算的方法

28. 除了好寫、易讀，debug更容易
private void UseData(String filePath) {
Byte[] buff = new Byte[BuffSize];
using (Stream str = File.OpenRead(filePath)) {
IAsyncResult asRes = str.BeginRead(buff, 0, buff.Length,
(ar) => { if (!ar.CompletedSynchronously) {
Int32 len = str.EndRead(ar);
ProcessData(buff, len);
}
}, state: null);
if (asRes.CompletedSynchronously) {
Int32 lenRes = str.EndRead(asRes);
ProcessData(buff, lenRes);
}
}
}
private async Task UseDataAsync(String filePath) {
Byte[] buff = new Byte[BuffSize];
using (Stream str = File.OpenRead(filePath)) {
Int32 lenRes = await str.ReadAsync(buff, 0, buff.Length);
ProcessData(buff, lenRes);
}
}

31. http://blogs.msdn.com/b/windows
appdev/archive/2012/04/24/diving
-deep-with-winrt-and-await.aspx

32. ReadAsync
WriteAsync CopyToAsync FlushAsync
ReadLineAsync ReadToEndAsync
Stream FileStream
MemoryStream TextReader TextWriter
http://msdn.microsoft.com/en-us/library/kztecsys

33. To handle the exception in C# or Visual Basic, you use a try/catch block
just as you do with synchronous code today:
var title;
var feedUri = new Uri("http://www.devhawk.com/rss.xml");
var client = new
Windows.Web.Syndication.SyndicationClient();
try
{
var feed = await client.RetrieveFeedAsync(feedUri);
title = feed.Title.Text;
}
catch (Exception ex)
{
// An exception occurred from the async operation
}

35. Portable Class Library

36. http://msdn.microsoft.com/library/gg597391(v=vs.110).aspx

38. System.Char

40. ONE ASP.NET – MVC 4, Web API, Bundling
& Minification

41. ASP.NET more pluggable,
more open, more fun
Scott Hanselman

46. Web API

49. Bundling &
Minification

54. MPGO big wins in CLR
garbage

56. Windows Store App 大募集
活動期間: 2012/09/20 ~ 2012/11/09
http://aka.ms/Win8AppFest

58.  年費:
- 公司帳戶：NT$2,840
- 個人帳戶：NT$1,420
 12個月免費:
- MSDN 訂戶
- BizSpark 計劃: 新創資訊公司
- DreamSpark 計劃: 老師、學生

59. http://msdn.microsoft.com/en-
us/library/ms171868(v=vs.110)
http://code.msdn.microsoft.com/Whats-
New-in-the-NET-e8d7545c