Beta 1 to Beta 2 Changes
Here's the first thing I would do if you are a developer of .NET
1. BOOKMARK THIS PAGE!
It will save you a ton of time as you migrate your apps. Then as you find a broken namespace in your app, or something else that no longer works in Beta2, click one of the links below and search the page (Ctrl-F for IE users) for your term. These documents are part of the downloads found at www.asp.net.
Here is the change list


API Changes (thanks to Alex Lowe from http://www.aspalliance.com/aldotnet/)

API changes broken down by Namespace

Compiler and Language Changes
C# (size 83k)
Visual Basic.NET (size 13k)
JScript.NET (size 10k)
Managed Extensions for C++ (size 39k)
SDK Tools Changes (size 55k)

Framework Class Library Changes
ASP.NET (size 274k)
ClassLib (size 410k)
Net Classes (size 35k)
Framework (size 390k)
Common Language Runtime (size 39k)
Interop (size 45k)
JIT (size 3k)
Metadata (size 5k)
Miscellaneous (size 41k)
Security (size 92k)

If you have alot of bandwidth, you can view the whole list, but it is 1.6MEG.
CLICK HERE to view the list.

说明：这只是页面的连接开始页，进去后，不下100个页面的连接，实在太恐怖，无法完全转贴过来，更不是一个人可以翻译完成的。所以就只转贴这个连接。需要的可以自己根据连接去查找。