string config = "server=127.0.0.1;userid=root;database=testess";

string query = String.Format("SELECT * FROM {0}", "bd");

MySqlConnection conexao = new MySqlConnection(config);

conexao.Open();

MySqlCommand command = new MySqlCommand(query, conexao);

MySqlDataAdapter adapter = new MySqlDataAdapter(command);

DataTable data = new DataTable();

adapter.Fill(data);

dataGridView1.DataSource = data;