Removing an XML element

In this recipe, we'll see how to remove an element from an XML document. You might use this when updating a shared configuration file that has a setting that no longer applies. We'll start out with a configuration file that has three add elements in it. During our installation, we'll remove the middle one.

Getting ready

To prepare for this recipe, perform the following steps:

1. Create a new setup project and call it RemoveElementInstaller.

2. Add an XML file named Web.config to the project and add the following markup to it:

   <?xml version="1.0"?>
   <configuration>
     <appSettings>
       <add key="UserSetting1" value="abc" />
       <add key="UserSetting2" value="def" />
       <add key="UserSetting3" value="ghi" />
     </appSettings>
   </configuration>

3. Add a Component element to Product.wxs to include the file in the install:

   <Component Id="cmpWebCONFIG" 
              Guid="{1B527456-4367-4D3D-AAE4-7E5C22FB9192}
     <File Source="Web.config...