C# 文件与二进制之间的转换

/// <summary>
/// 工具类：文件与二进制流间的转换
/// </summary>
public class FileBinaryConvertHelper
{
/// <summary>
/// 将文件转换为byte数组
/// </summary>
/// <param name="path">文件地址</param>
/// <returns>转换后的byte数组</returns>
public static byte[] File2Bytes(string path)
{
if (!System.IO.File.Exists(path))
{
return new byte[0];
}

FileInfo fi = new FileInfo(path);
byte[] buff = new byte[fi.Length];

FileStream fs = fi.OpenRead();
fs.Read(buff, 0, Convert.ToInt32(fs.Length));
fs.Close();

return buff;
}

/// <summary>
/// 将byte数组转换为文件并保存到指定地址
/// </summary>
/// <param name="buff">byte数组</param>
/// <param name="savepath">保存地址</param>
public static void Bytes2File(byte[] buff, string savepath)
{
if (System.IO.File.Exists(savepath))
{
System.IO.File.Delete(savepath);
}

FileStream fs = new FileStream(savepath, FileMode.CreateNew);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(buff, 0, buff.Length);
bw.Close();
fs.Close();
}
}