System.Data.SQLite

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Recently wrote a generalized code in C#.Net to handling databases. So far it works fine for MS SQL & MySQL but when I try to use SQLite I keep getting the error in Data Fill to Datatable. I am using VS 2010, .Net framework 4 and System.Data.SQLite 1.0.99.0.
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The project file is attached to this <a href="https://drive.google.com/file/d/0B_czp2rbfZFjU0RxSElxaFFuVEU/view?usp=sharing">link</a>. Please go through it. Error details are commented in the code.
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Thanks
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The error you describe appears to be caused by the database file not being
present in combination with using the "FailIfMissing" connection string
property.

Also, you cannot dispose of a SQLiteCommand and then use it (i.e. indirectly
for the SQLiteDataAdapter fill operation).