c# 重试机制

        protected async Task<T> TryOperation<T>(int maxRetryCount,Func<Task<T>> funcGetData)
        {
            Exception lastException = null;
            var fixdMaxRetryCount = maxRetryCount > 1 ? maxRetryCount : 1;
            for (var i=0;i< fixdMaxRetryCount; i++)
            {
                try
                {
                    var data = await funcGetData().ConfigureAwait(false);
                    return data;
                }
                catch(Exception e)
                {
                    lastException = e;
                    DoLogException(e);
                    await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, i - 1))).ConfigureAwait(false);
                }
            }
            throw lastException;
        }