How to use streams for file operations in C#

In C#, you can use streams to perform file operations. Below is a simple example demonstrating how to use streams to read file contents and write them to a new file.

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！");
    }
}

In the example above, the content of the source file is first read using FileStream and StreamReader, and then the read content is written to a new file using FileStream and StreamWriter. Finally, a message indicating the completion of the file operations is displayed on the console.

It is important to remember to close the stream object in a timely manner when using stream operations to release resources. The ‘using’ statement can be used to automatically close the stream object.