كود الربط بتاع المحاضره الللى فاتت بس بالسى شارب

using System.Data.SqlClient;
SqlConnection sqlConnection1 = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=\"" + Directory.GetCurrentDirectory() + "\\ExamSystem.mdf\";Integrated Security=True;User Instance=True");
                SqlCommand cmd = new SqlCommand();
                SqlDataReader reader;

 Connection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0; Data Source = c:\\Company.accdb");
          Connection.Open();
          // establish command object
          publishersCommand = new OleDbCommand("SELECT * FROM Publishers ORDER BY PubID", Connection);
          // establish data adapter/data table
          publishersAdapter = new OleDbDataAdapter();
          publishersAdapter.SelectCommand = publishersCommand;
          publishersTable = new DataTable();
          publishersAdapter.Fill(publishersTable);