wcf连接mysql

using System;
using System.Data;
using System.Data.SqlClient;
using System.ServiceModel;

[ServiceContract]
public interface IMyService
{
    [OperationContract]
    string GetData(int id);
}

public class MyService : IMyService
{
    private string connectionString = "Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;";

    public string GetData(int id)
    {
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            string query = "SELECT * FROM MyTable WHERE Id = @Id";
            using (SqlCommand command = new SqlCommand(query, connection))
            {
                command.Parameters.AddWithValue("@Id", id);
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    if (reader.Read())
                    {
                        return reader["Data"].ToString();
                    }
                }
            }
        }
        return null;
    }
}

class Program
{
    static void Main(string[] args)
    {
        using (ServiceHost host = new ServiceHost(typeof(MyService)))
        {
            host.Open();
            Console.WriteLine("Service is running...");
            Console.ReadLine();
            host.Close();
        }
    }
}