如何在.Net Core3.1中从Sql命令的DataTable中返回JSON对象

using System;
using System.Data;
using System.Data.SqlClient;
using System.Text.Json;

public class Program
{
    public static string GetJsonFromDataTable()
    {
        string connectionString = "your_connection_string";
        string sqlQuery = "SELECT * FROM your_table";

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

            using (SqlCommand command = new SqlCommand(sqlQuery, connection))
            {
                using (SqlDataAdapter adapter = new SqlDataAdapter(command))
                {
                    DataTable dataTable = new DataTable();
                    adapter.Fill(dataTable);

                    string json = JsonSerializer.Serialize(dataTable);
                    return json;
                }
            }
        }
    }

    public static void Main(string[] args)
    {
        string jsonResult = GetJsonFromDataTable();
        Console.WriteLine(jsonResult);
    }
}