分享一个我常用的c# winform项目 文件和文件夹操作类源代码，用起来比较方便，每个项目几乎都要用到

这是一个我比较常用的c# winform项目文件和文件夹操作类代码，因为几乎每个项目都需要用到文件和文件夹的操作，所以日积月累就写了这么多比较常用的函数，写的不对的地方，还请高人点评。

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using System;
using System.IO;

public class FileFolderHandler
{
    // 文件处理

    // 文件读取
    public string ReadFile(string filePath)
    {
        if (File.Exists(filePath))
        {
            return File.ReadAllText(filePath);
        }
        else
        {
            throw new FileNotFoundException("文件不存在！");
        }
    }

    // 文件复制
    public void CopyFile(string sourcePath, string destinationPath)
    {
        File.Copy(sourcePath, destinationPath, true);
    }

    // 文件改名
    public void RenameFile(string filePath, string newFileName)
    {
        if (File.Exists(filePath))
        {
            string directory = Path.GetDirectoryName(filePath);
            string newFilePath = Path.Combine(directory, newFileName);
            File.Move(filePath, newFilePath);
        }
        else
        {
            throw new FileNotFoundException("文件不存在！");
        }
    }

    // 文件删除
    public void DeleteFile(string filePath)
    {
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
        }
        else
        {
            throw new FileNotFoundException("文件不存在！");
        }
    }

    // 判断文件是否存在
    public bool IsFileExists(string filePath)
    {
        return File.Exists(filePath);
    }

    // 文件格式判断
    public string GetFileExtension(string filePath)
    {
        return Path.GetExtension(filePath);
    }

    // 文件大小读取
    public long GetFileSize(string filePath)
    {
        if (File.Exists(filePath))
        {
            return new FileInfo(filePath).Length;
        }
        else
        {
            throw new FileNotFoundException("文件不存在！");
        }
    }

    // 文件夹处理

    // 遍历文件夹所有文件
    public string[] GetAllFilesInFolder(string folderPath)
    {
        if (Directory.Exists(folderPath))
        {
            return Directory.GetFiles(folderPath);
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }

    // 遍历文件夹所有文件包含子文件夹
    public string[] GetAllFilesInFolderRecursive(string folderPath)
    {
        if (Directory.Exists(folderPath))
        {
            return Directory.GetFiles(folderPath, "*", SearchOption.AllDirectories);
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }

    // 判断文件夹是否存在
    public bool IsFolderExists(string folderPath)
    {
        return Directory.Exists(folderPath);
    }

    // 创建文件夹
    public void CreateFolder(string folderPath)
    {
        Directory.CreateDirectory(folderPath);
    }

    // 删除文件夹
    public void DeleteFolder(string folderPath)
    {
        if (Directory.Exists(folderPath))
        {
            Directory.Delete(folderPath, true);
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }

    // 文件夹文件大小统计
    public long GetFolderSize(string folderPath)
    {
        if (Directory.Exists(folderPath))
        {
            long size = 0;
            string[] files = Directory.GetFiles(folderPath, "*", SearchOption.AllDirectories);
            foreach (string file in files)
            {
                size += new FileInfo(file).Length;
            }
            return size;
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }

    // 文件夹隐藏属性修改
    public void SetFolderHiddenAttribute(string folderPath, bool isHidden)
    {
        if (Directory.Exists(folderPath))
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(folderPath);
            directoryInfo.Attributes = isHidden ? directoryInfo.Attributes | FileAttributes.Hidden : directoryInfo.Attributes & ~FileAttributes.Hidden;
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }

    // 文件夹改名
    public void RenameFolder(string folderPath, string newFolderName)
    {
        if (Directory.Exists(folderPath))
        {
            string directory = Path.GetDirectoryName(folderPath);
            string newFolderPath = Path.Combine(directory, newFolderName);
            Directory.Move(folderPath, newFolderPath);
        }
        else
        {
            throw new DirectoryNotFoundException("文件夹不存在！");
        }
    }
}