从数据库读取SQLite DateTime值并将其赋值给C#字符串变量

using System;
using System.Data.SQLite;

class Program
{
    static void Main()
    {
        string connectionString = "Data Source=<数据库文件路径>;Version=<SQLite版本号>;";
        using (SQLiteConnection connection = new SQLiteConnection(connectionString))
        {
            connection.Open();

            string query = "SELECT DateTimeColumn FROM TableName WHERE ...";
            using (SQLiteCommand command = new SQLiteCommand(query, connection))
            {
                using (SQLiteDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        DateTime dateTimeValue = reader.GetDateTime(0);
                        string stringValue = dateTimeValue.ToString("yyyy-MM-dd HH:mm:ss");
                        // 将stringValue赋值给C#字符串变量
                    }
                }
            }
        }
    }
}