VS2010插件 - 错误1当前上下文中不存在名称“ExecutePostAccountUpdate”

I'm trying to make a plugin that grabs the revenue from opportunities and total up the revenue on the Account entity. I'm using Visual Studio 2010 Professional and using the MS Dynamics CRM 2013 SDK. I have been following two guides to help me get there, but they are for Dynamics CRM 2011. There aren't many guides out there for CRM 2013 so I was hoping to use this CRM 2011 guide to get a basic plugin going and modify it to my needs.I'm trying to make a plugin that grabs the reve