c＃代码实现数据备份功能，请给出代码

在C#中，实现数据备份功能通常涉及数据库操作，这里我会提供一个基本的例子，展示如何使用ADO.NET连接到SQL Server数据库并创建备份。假设我们有一个名为`MyDatabase`的数据库，并且有一个`BackupData`函数来执行备份：

using System;
using System.Data.SqlClient;

public class DatabaseBackup
{
    private string connectionString = "Data Source=your_server;Initial Catalog=MyDatabase;User ID=your_username;Password=your_password;";

    public void BackupData(string backupFileName)
    {
        // 创建SqlConnection实例
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            try
            {
                // 打开数据库连接
                connection.Open();

                // 创建SqlCommand实例来执行备份命令
                SqlCommand command = new SqlCommand(
                    "BACKUP DATABASE MyDatabase TO DISK = @backupPath WITH NOFORMAT, NOINIT, NAME = N'MyDatabase_Backup', SKIP, NOUNLOAD, STATS = 10",
                    connection);

                // 设置备份文件路径参数
                command.Parameters.AddWithValue("@backupPath", backupFileName + ".bak");

                // 执行备份命令
                Console.WriteLine("Starting database backup...");
                command.ExecuteNonQuery();
                Console.WriteLine($"Backup completed. Backup file saved as {backupFileName}.bak");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error occurred during backup: {ex.Message}");
            }
        }
    }
}

// 使用示例
public static void Main()
{
    DatabaseBackup dbBackup = new DatabaseBackup();
    string backupFilePath = @"C:\Backups\";
    dbBackup.BackupData(backupFilePath);
}