VS 关于无法打开项目文件，此安装不支持该项目类型的问题

用VS打开后有时会出现类似： 无法打开项目文件，此安装不支持该项目类型 的错误，这个错误一般都是由于用低版本VS打开高版本项目文件造成的 其中包括： 1、用VS2003 打开包括VS2005以上版本项目文件（如VS2005、VS2008） 2、用VS2005打开包括VS2005+Sp1及以上项目文件(如VS2005+sp1、VS2008) 解决办法是进行相关VS的版本升级（包括打VS2005的Sp1补订包） 相关VS软件可以到[Asp.net常用工具下载]板块去下载！

Microsoft Visual Studio各版本下载

Microsoft® Visual Studio® 2005 Express Editions Service Pack 1

http://www.microsoft.com/zh-cn/download/details.aspx?id=804

Microsoft Visual Studio 2008 Express Edition - 简体中文
概述（英文）
The Visual Studio 2008 Express Editions all-in-one DVD includes:

Visual Web Developer 2008 Express Edition enables developers to rapidly create Web applications that deliver the highest quality rich user experiences. This new version enables cool fun features that build on the latest technologies including AJAX, CSS, LINQ and JavaScript IntelliSense.

Visual Basic 2008 Express Edition and Visual C# 2008 Express Edition enables developers to rapidly create Windows applications that deliver the highest quality rich user experiences. These new versions enable cool fun features that build on the latest technologies including WPF, WCF and LINQ.

Visual C++ 2008 Express Edition is the development environment for creating native Windows applications that deliver the highest quality rich user experiences. This new version includes an easy installation of the Windows Platform SDK.

Also included is SQL Server 2005 Compact Edition, SQL Server 2005 Express Edition and MSDN Express documentation.

Microsoft Visual Studio 2010 Express Edition

http://msdn.microsoft.com/zh-cn/vstudio/default.aspx