XML : How can I remove a section of an XML using PowerShell?

I have a PowerShell script that is writing to the machine.config file, it has a section written into it that I want to remove:

  <system.net>    <connectionManagement>      <add address = "*" maxconnection = "$(200 * $numberOfCores)" />    </connectionManagement>  </system.net>    

This is what the entire file looks like:

  <configuration>    <system.data>      <DbProviderFactories />    </system.data>    <system.net>      <connectionManagement>        <add address = "*" maxconnection = "$(200 * $numberOfCores)" />      </connectionManagement>    </system.net>  </configuration>    

I want to remove the entire <system.net> section, but I cant figure out how to remove this section. I can remove the children, but I want the section gone, can someone please help me remove it?

For example, I can use

  $node.RemoveChild(($node.SelectSingleNode("connectionManagement"))) | Out-Null     

to remove <connectionManagement> inside of <system.net> but how do I remove that entire section/node, whatever it is called?

I want my final XML file to be

  <configuration>    <system.data>      <DbProviderFactories />    </system.data>  </configuration>    

How can I delete the <system.net> section?