带进度条的C#异步文件复制

using System;
using System.IO;
using System.Threading.Tasks;

public class FileCopyWithProgressBar
{
    public async Task CopyFileAsync(string sourceFilePath, string destinationFilePath)
    {
        using (FileStream sourceStream = new FileStream(sourceFilePath, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: 4096, useAsync: true))
        using (FileStream destinationStream = new FileStream(destinationFilePath, FileMode.CreateNew, FileAccess.Write, FileShare.None, bufferSize: 4096, useAsync: true))
        {
            byte[] buffer = new byte[4096];
            long totalBytesRead = 0;
            int bytesRead;

            while ((bytesRead = await sourceStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
            {
                await destinationStream.WriteAsync(buffer, 0, bytesRead);
                totalBytesRead += bytesRead;

                // 计算进度并显示进度条
                double progressPercentage = (double)totalBytesRead / sourceStream.Length * 100;
                Console.WriteLine($"Progress: {progressPercentage:F2}%");
            }
        }

        Console.WriteLine("File copy completed.");
    }
}