get firefox history through c#

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C#

hi all

i am implementing a window application for getting firefox browsing history.
i know that task complete by open or access "placess.sqlite" in c#.net
but i have problem to access or open places.sqlite through c# i use the code below :

using system.data.sqlite;

SQLiteConnection sql_con;
SQLiteCommand sql_cmd;
SQLiteDataAdapter DB;
DataTable DT = new DataTable();

string dbpath="C:\Users\administrator\AppData\Roaming\Mozilla\Firefox\Profiles\2f92gtpv.default\places.sqlite"

sql_con = new SQLiteConnection("Data Source=" + dbPath +
";Version=3;New=False;Compress=True;");

// Open the Connection
sql_con.Open();
sql_cmd = sql_con.CreateCommand();

// Select Query
string CommandText = "select * from " + table;


but when open the connection i got error:File opened that is not a database file
file is encrypted or is not a database

even places.sqlite database is perfectly open in sqlite manger and i can write query there and its provide result in well maner

if anyone have any solution please provide perfect solution

thanx & regards
Sanjay