c#中SQL时间戳的等效类型是什么？

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "your_connection_string_here";
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();

            // 插入新记录并获取时间戳
            string insertQuery = "INSERT INTO YourTable (Column1) VALUES (@Value1); SELECT @@IDENTITY, TimestampColumn FROM YourTable WHERE Id = SCOPE_IDENTITY();";
            using (SqlCommand command = new SqlCommand(insertQuery, connection))
            {
                command.Parameters.AddWithValue("@Value1", "SomeValue");
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    if (reader.Read())
                    {
                        int id = reader.GetInt32(0);
                        byte[] timestamp = (byte[])reader["TimestampColumn"];
                        Console.WriteLine($"Inserted ID: {id}, Timestamp: {BitConverter.ToString(timestamp)}");
                    }
                }
            }

            // 更新记录并检查时间戳
            string updateQuery = "UPDATE YourTable SET Column1 = @NewValue WHERE Id = @Id AND TimestampColumn = @OldTimestamp;";
            using (SqlCommand command = new SqlCommand(updateQuery, connection))
            {
                command.Parameters.AddWithValue("@NewValue", "UpdatedValue");
                command.Parameters.AddWithValue("@Id", id);
                command.Parameters.AddWithValue("@OldTimestamp", timestamp);

                int rowsAffected = command.ExecuteNonQuery();
                if (rowsAffected == 0)
                {
                    Console.WriteLine("Update failed: Timestamp mismatch (concurrency issue).");
                }
                else
                {
                    Console.WriteLine("Update successful.");
                }
            }
        }
    }
}