C#怎么使用流实现文件操作

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string sourceFilePath = "source.txt";
        string destinationFilePath = "destination.txt";

        // 读取源文件内容
        using (FileStream sourceStream = new FileStream(sourceFilePath, FileMode.Open))
        {
            using (StreamReader reader = new StreamReader(sourceStream))
            {
                string content = reader.ReadToEnd();

                // 写入新文件
                using (FileStream destinationStream = new FileStream(destinationFilePath, FileMode.Create))
                {
                    using (StreamWriter writer = new StreamWriter(destinationStream))
                    {
                        writer.Write(content);
                    }
                }
            }
        }

        Console.WriteLine("文件操作完成！");
    }
}