.net – Need help regarding Lucene index/query

I want to have a "citystate" field in Lucene index which will store various city state values like:

• Chicago, IL
• Boston, MA
• San Diego, CA

How do i store these values(shud it be tokenized or non-tokenized?) in Lucene and

how do I generate a query (should it be phrasequery or termquery or something else?) which gets me all records whose citystate contain: Chicago, IL OR Boston, MA OR San Diego, CA ??

I would appreciate if i can get help with the code as well.

Thanks.