wpf read an write resources embedded

hello i donot know english good
i have xml file in wpf and add into project

<Application.Resources>
        <!-- Resources scoped at the Application level should be defined here. -->
        <XmlDataProvider x:Key="xmlmah" Source="test.xml" d:IsDataSource="True"/>
    </Application.Resources>

i want read and write file but All the executable file and other files of type xml file isnot created

xml file
<?xml version="1.0" encoding="utf-8" ?>
- <SAVED>
  <ITEM>mah1</ITEM>
  <ITEM>mah2</ITEM>
  <ITEM>mah3</ITEM>
  </SAVED>