Parse xml config file
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how i can get and set value in this .xml file(in code)

    <?xml version="1.0" encoding="utf-8" ?>
    <configuration>
      <connectionStrings>
        <add name="connstring" connectionString="server=localhost;User Id=root;Persist Security Info=True;database=marctest;password=PASSWORD" providerName="MySql.Data.MySqlClient" />
      </connectionStrings>
    </configuration>

server,User Id... etc.