How to display data from Access database? C#

Question

private void Bsearch_Click(object sender, EventArgs e)
{
try
{
connection.Open();
OleDbCommand command = new OleDbCommand();
command.Connection = connection;
string query = "select* from Students WHERE Firstname LIKE '" + tbsearchid.Text + "'";
command.CommandText = query;

OleDbDataReader reader = command.ExecuteReader();
while (reader.Read())
{
tbFname.Text = reader["Firstname"].ToString();
tbLname.Text = reader["Lastname"].ToString();
/*this part*/ tbmulti.Text = reader[(Course1: + "Course1") (Course2 + "Course2")].ToString(); // my access db has 10 courses colums course1 -course10
/*this part*/ tbavg.Text = reader[ provide the avg of the courses]
/*this part*/ tbmax.Text = reader[provides the max of the courses]

}

connection.Close();

}
catch (Exception ex)
{
MessageBox.Show("Error " + ex);
}