Csharp MySQL如何在查询中插入变量

using System;
using MySql.Data.MySqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "server=localhost;user=root;database=testdb;port=3306;password=yourpassword";
        string query = "INSERT INTO users (username, email) VALUES (@username, @email)";

        try
        {
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                MySqlCommand command = new MySqlCommand(query, connection);
                command.Parameters.AddWithValue("@username", "JohnDoe");
                command.Parameters.AddWithValue("@email", "john.doe@example.com");

                connection.Open();
                int rowsAffected = command.ExecuteNonQuery();
                Console.WriteLine($"{rowsAffected} row(s) inserted.");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}