[ASP.NET] SQL Data load

void LoadData()
        {
            string connStr = "Data Source=WOJTEK-LAPTOP\\SQLEXPRESS;Initial Catalog = TestDB;Integrated Security = true;";

            using (var conn = new SqlConnection(connStr))
            {
                SqlCommand cmd = new SqlCommand("SELECT * FROM Videos",conn);
                conn.Open();
                DataTable dt = new DataTable();
                dt.Load(cmd.ExecuteReader());
                GridView1.DataSource = dt;
                GridView1.DataBind();
                conn.Close();
            }
        }