新建Sharepoint2013应用程序项目时总报错：
“尝试加载某些必须组件时出错。请确保安装以下必备组件：
Microsoft Web开发人员工具
Microsoft Exchange Web 服务
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An error occurred whilst trying to load some required components, Please ensure the following prerequisite components are installed.
Microsoft Web Developer Tools
Microsoft Exchange Web Services"
The problem is that the Microsoft Web Platform Installer adds parameters when installing the Microsoft Exchange Web Services that must be used in order to get around the error. If you have already installed the Microsoft Exchange Web Services, uninstall it from Control Panel and then open up a command prompt. Navigate to the location of EwsManagedApi32.msi. In the command prompt, run
EwsManagedApi32.msi addlocal="ExchangeWebServicesApi_Feature,ExchangeWebServicesApi_Gac"