help in search xml file

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C#

.NET

hey , please i have a project and i need some help with search in xml file
just question 4 and 5.


Write a program that manages a newspaper. The data is stored in an XML file having the
following DTD:
<b>!DOCTYPE NEWSPAPER [
!ELEMENT NEWSPAPER (ARTICLE+)
!ELEMENT ARTICLE (TITLE,BYLINE,LEAD,BODY,NOTES)
!ELEMENT TITLE (#PCDATA)
!ELEMENT BYLINE (#PCDATA)
!ELEMENT LEAD (#PCDATA)
!ELEMENT BODY (#PCDATA)
!ELEMENT NOTES (#PCDATA)
!ATTLIST ARTICLE AUTHOR CDATA #REQUIRED
!ATTLIST ARTICLE EDITOR CDATA #IMPLIED
!ATTLIST ARTICLE DATE CDATA #IMPLIED
]</b>
<big>Write windows forms application using Visual C# .Net programming language that does
the following:
1. Show the list of articles.
2. Show the article's details when select them.
3. Add/Remove article. (Note: use XmlDocument, XmlNode classes. InsertAfter
method might help you!).
4. Search about article by part of its title.
5. Search about article by part of its author name.</big>