比如网络访问或硬件参数设置需要重试，可引用gunet上的Polly库。

同步方式（每次重试有不同的时间间隔）

            var polly = Policy.Handle<Exception>().WaitAndRetry(new[] { new TimeSpan(0, 0, 1), new TimeSpan(0, 0, 2), new TimeSpan(0, 0, 3) }, (ex, t, retryCnt, context) => {
                Debug.WriteLine($"{ex.Message}, {t}, {retryCnt}");
            });
            polly.ExecuteAndCapture(() => {
                Thread.Sleep(1000);
                var random = new Random();
                var v = random.Next(0, 10);
                if (v < 50)
                    throw new Exception("V < 50");
                Debug.WriteLine($"polly.ExecuteAndCapture {Thread.CurrentThread.ManagedThreadId}");
            });

异步方式（每次重试有不同的时间间隔）

            var polly = Policy.Handle<Exception>().WaitAndRetryAsync(new[] { new TimeSpan(0, 0, 1), new TimeSpan(0, 0, 5), new TimeSpan(0, 0, 10) }, (ex, t, retryCnt, context) => {
                Debug.WriteLine($"{ex.Message}, {t}, {retryCnt}  ThreadID={Thread.CurrentThread.ManagedThreadId}");
            });
            polly.ExecuteAndCaptureAsync(async () => {
                await Task.Run(() => {
                    Thread.Sleep(1000);
                    var random = new Random();
                    var v = random.Next(0, 10);
                    if (v < 50)
                        throw new Exception("V < 50");
                    Debug.WriteLine($"polly.ExecuteAndCapture {Thread.CurrentThread.ManagedThreadId}");
                });
            });

详细介绍参考：x​​​​​​​C#调用Polly库实现捕捉异常处理的操作代码_C#教程_脚本之家Polly 是一个 .NET 弹性和瞬态故障处理库,允许开发人员以 Fluent 和线程安全的方式来实现重试、断路、超时、隔离和回退策略,本文给大家介绍了C#调用Polly库实现捕捉异常处理操作,文中有详细的代码示例供大家参考,需要的朋友可以参考下https://www.jb51.net/program/3264462an.htm

Timeout （异步，token方式，业务层需要while循环判断，不是太香）

            var asyncPolicy = Policy.TimeoutAsync(TimeSpan.FromSeconds(2));
            await asyncPolicy.ExecuteAsync(
                async ct =>
                {
                    await Task.Run(() =>
                    {
                        while (true)
                        {
                            if (ct.IsCancellationRequested)
                            {
                                Console.WriteLine($"检测到超时，退出  ManagedThreadId={Thread.CurrentThread.ManagedThreadId}");
                                return;
                            }
                            Thread.Sleep(1000);
                        }
                    }).ConfigureAwait(false);
                },
             CancellationToken.None);