Get an early look at Visual Studio code name "Orcas"
The next version of Visual Studio, Microsoft® Visual Studio® code name “Orcas”, will provide an industry-leading developer experience for Windows Vista, the 2007 Microsoft Office system, and the Web. In addition, it will continue in the Microsoft tradition of development language innovation. To enable early feedback, this page provides links to Community Technology Preview (CTP) and Beta releases of Visual Studio code name “Orcas”, and for technologies that we plan to include in it. As previews of additional technologies become available, we will make them available from this page.

We encourage you to download and try these early releases. Before installing a release, review the prerequisites as some releases may require additional software prior to installation. As with all prerelease software, we encourage you only to install these on a secondary machine, or in a virtual machine, as they are not supported by Microsoft Services support teams. As the goal of these previews is to gather feedback from the developer community, please use Microsoft Connect to report any issues, or to suggest improvements.

Visual Studio Orcas將是第一個允許開發人員針對多個.NET Framework版本開發的Visual Studio版本。這意味著你可以打開或創建一個項目，明確地指定.NET Framework 2.0或者3.0或者3.5版本，Visual Studio會自動地過濾Intellisense，工具箱控件，和添加引用的對話框項諸如此類的東西，只顯示指定框架版本里支持的那些特性。然后你可以針對這些不同框架版本進行編譯，還能得到每個版本的完全的調試支持。多定向(Multi-Targeting)的很大的好處在于，你可以馬上在 Visual Studio Orcas 中使用絕大多數的新特性(譬如，所見即所得(WYSWIYG)設計器和JavaScript 編輯器等)，即使你還在開發或更新老一點版本的項目。

Microsoft .NET Framework 3.5 – Beta 1

The Microsoft .NET Framework 3.5 Beta 1 is a preview release of the latest version of the .NET Framework. Many ISV’s, enterprises and Microsoft product teams are successfully building on the new features Windows Workflow Foundation (WF), Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF) and Windows CardSpace in the .NET Framework 3.0. Microsoft plans to continue to invest in the .NET Framework developer platform and in support of existing users the .NET Framework 3.5 has a minimal number of breaking changes.

Microsoft .NET Framework 3.5 - Beta 1

最新的Visual Studio Codename "Orcas" Express Edition beta1下載。本次下載一共提供了四個版本試用，分別為 
Visual Basic Codename "Orcas" Express Edition
Visual C# Codename "Orcas" Express Edition
Visual Web Developer Codename "Orcas" Express Edition
Visual C++ Codename "Orcas" Express Edition
各版本相關的信息請點擊各圖片查看或點擊MSDN鏈接查看。

 
Visual Basic Codename "Orcas" Express Edition 下載
 
Visual C# Codename "Orcas" Express Edition 下載
 
Visual Web Developer Codename "Orcas" Express Edition 下載
 
Visual C++ Codename "Orcas" Express Edition 下載  

各版本相關的信息請點擊各圖片查看或點擊MSDN鏈接查看 http://msdn.microsoft.com/vstudio/express/future/support/default.aspx
MSDN下載鏈接：http://msdn.microsoft.com/vstudio/express/future/downloads/default.aspx

System Requirements

Windows XP

If you are running Windows XP, please make sure you have Service Pack 2 installed. You can run Windows Update to ensure you have the latest security fixes and updates available for Windows XP.

Windows Vista

Be sure you've run Windows Update before installing Visual Studio Codename "Orcas" Express Editions.