Sql Connection string to my mdf database file

Question

My database.mdf is in the same folder where my application.exe is. I searched other questions and found this way but after I start my program I get an error

string dbPath = Application.StartupPath + "\\DATABASE1.MDF";

string strConnection = @"Data Source =.\SQLEXPRESS; AttachDbFilename = [" + dbPath + "]; Integrated Security = True; Connect Timeout = 30; User Instance = True";

Answer 1

NVM found soluation . the problem was []

string dbPath = Application.StartupPath + "\\DATABASE1.MDF";
        string strConnection =
            @"Data Source =.\SQLEXPRESS; AttachDbFilename = " + dbPath + "; Integrated Security = True; Connect Timeout = 30; User Instance = True";