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Possible Duplicate:
What is an MDF file

What is the purpose of the mdf file if the database is SQLEXPRESS in following connection string : 

connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true"

Just something that is not clear after a few tutorials. Thanks!

Community
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mishap
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1 Answers1

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The MDF file is your Data File - where the database structure and all the data are stored.

mal-wan
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