Sugget Appropriate Design Pattern for below problems

Problem 1:

Please consider the below XML code snippet: -

<employees>
    <employee>
        <name>Ram</name>
        <age>30</age>
        <designation>Software Engineer</designation>
    </employee>
    <employee>
        <name>Rahim</name>
        <age>40</age>
        <designation>Senior Developer</designation>
    </employee>
</employees>

As part of your assignment, please write C# code to implement the following functionalities: - * Read the XML file. * Add new or delete existing employees. * Write to the XML file.

Problem 2:

Assume that the above solution (in Problem 1) has been provided to you as part of a third party component. Please extend the C# code to include a new address node and create the provision to add new or delete existing employees.

<employees>
    <employee>
        <name>Ram</name>
        <age>30</age>
        <designation>Software Engineer</designation>
    </employee>
    <employee>
        <name>Rahim</name>
        <age>40</age>
        <designation>Senior Developer</designation>
    </employee>
    <employee>
        <name>Robert</name>
        <age>35</age>
        <designation>Project Manager</designation>
    <address>
        <doorNo>10</doorNo>
        <street>Park Circle</street>
        <town>Chennai</town>
        <state>Tamil Nadu</state>
    </address>
    </employee>
</employees>

The idea of this problem should be to provide a generic solution to any new node (for e.g., Qualifications consisting of UG, PG & certifications) added to this XML file in future.

I'm just confused which design pattern will suitable for this 2 problems. Please help me. Thanks in advance.