您需要将Android布局文件的xsd-方案添加到Visual Studio.

You need to add the xsd-schemas for android layout files to Visual Studio.

将android-layout-xml.xsd和schemas.android.com.apk.res.android.xsd从C:\Program Files (x86)\Xamarin Studio\AddIns\MonoDevelop.MonoDroid\schemas复制到C:\Program Files (x86)\Microsoft Visual Studio 14.0\Xml\Schemas

然后您可以通过XML -> Schemas -> Add对话框在Visual Studio中添加"这些架构.

You can then "Add" these schemas inside Visual Studio via the XML -> Schemas -> Add dialog.

在 Xamarin知识库.