C# Interop string search

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C#

I am just learning C# and would like code to loop all pages in a Microsoft Word 2010 document and find if a string exists in the page header, body, and footer and print the results to a text file.
Example: Find if a certain date is in the header, body, and footer of each page of the Microsoft Word 2010 document. If the date is not found in the header of page 5, then print date is not in the header of page 5.