I'm building a dictionary and I have a database of words with equivelant meaning in Access file. I want to use hash table for finding the words and the meaning. My question is how to implement the hashtable which can use the file as the reference. or any other guide you might have about this case?

As long as your key in the Dictionary/Hashtable is unique, it doesn't matter.
Open the database, loop through the queried data, Add() the data to the Dictionary<string, string>. Close the database.

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