安裝Serilog.Sinks.Seq(5.2.3.0)，Serilog.Sinks.File(7.0.0)

下載Seq安裝包并安裝（https://datalust.co/download）

代碼如下：

        private Logger _logger;private void button1_Click(object sender, EventArgs e){_logger = new LoggerConfiguration().WriteTo.Seq("http://localhost:5341").WriteTo.File(path:"D:\\myapplog\\GlobalLog-.txt",//formatter: new Serilog.Formatting.Compact.CompactJsonFormatter(),//設置日志為json格式fileSizeLimitBytes: 2_000,retainedFileTimeLimit: TimeSpan.FromDays(7),rollOnFileSizeLimit: true,rollingInterval: RollingInterval.Day).CreateLogger();}private void button2_Click(object sender, EventArgs e){_logger.Information("hello info");_logger.Warning("hello warning {user},{time}", "logtest", DateTime.Now);}private void button3_Click(object sender, EventArgs e){_logger.Dispose();}