public static async Task WriteMd5(Stream stream, Config config)
{
Log.Information("开始生成 md5 值");
var md5 = new MD5CryptoServiceProvider();
var hash = await md5.ComputeHashAsync(stream);
var md5Hex = string.Concat(hash.Select(x => x.ToString("X2")));
await File.WriteAllTextAsync($"./{config.Version}.md5", md5Hex);
Log.Information("生成结束。md5: {0}", md5Hex);
}