using sql in mvc controller in asp.net

public ActionResult Index()
        {
        	string connectionString = "Data Source=Whatever; Initial Catalog=Northwind; Integrated security=True;";
			// your "normal" sql here
			string commandText = "select" +
									" _c.CompanyName" +
								" from Customers _c" +
								" inner join Orders _o on _o.CustomerID = _c.CustomerID" +
								" Where _o.ShipCity = @city";
			List<string> result = new List<string>();
			using (SqlConnection connection = new SqlConnection(connectionString))
			{
				SqlCommand cmd = new SqlCommand(commandText, connection);
				cmd.Parameters.Add("@city", SqlDbType.NVarChar);
				cmd.Parameters["@city"].Value = "Madrid";

				connection.Open();
				using (SqlDataReader reader = cmd.ExecuteReader())
				{
					while (reader.Read())
					{
						result.Add(reader.GetString(0));
					}
				}
			}

        	return View(result);
        }
</string></string>