SQL connection string

Question

hai expert please help me......
I am using SQL server managent studio express and c# for windows application...i have copied my data base to bin..I am using the following connection string..but it is not taking the database from bin.
SqlConnection  con=new SqlConnection( "Data Source=.\\SQLEXPRESS;Initial Catalog=dbRDAgent;Integrated Security=SSPI");
Plaese give me the connection string for establishing a connection to the database in bin.
thanks in advance................