以编程方式检索与SQL Server Management Studio gui返回的源相同的SQL Server存储过程源？

using System;
using System.Data.SqlClient;

namespace GetStoredProcedureSource
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;";
            string storedProcedureName = "myStoredProcedure";

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                using (SqlCommand command = new SqlCommand("sp_helptext", connection))
                {
                    command.CommandType = System.Data.CommandType.StoredProcedure;
                    command.Parameters.AddWithValue("@objname", storedProcedureName);

                    using (SqlDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            Console.WriteLine(reader.GetString(0));
                        }
                    }
                }
            }
        }
    }
}

USE myDatabase;
GO
SELECT definition
FROM sys.sql_modules
WHERE object_id = OBJECT_ID('myStoredProcedure');