Install-Package Serilog Install-Package Serilog.Sinks.Console Install-Package Serilog.Sinks.File
using Serilog; namespace ConsoleApp13 {internal class Program{static void Main(string[] args){Console.OutputEncoding=System.Text.Encoding.UTF8;SerilogDemo();Console.WriteLine("Hello, World!");}static void SerilogDemo(){try{Log.Logger = new LoggerConfiguration().WriteTo.Console(outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj}{NewLine}{Exception}").WriteTo.File(path:Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),"CollectTest2","log_.log"),rollingInterval:RollingInterval.Day,rollOnFileSizeLimit:true,fileSizeLimitBytes:1024*1024*1024,retainedFileCountLimit:3000,shared:true,outputTemplate:"{Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{Level:u3}] {Message:lj} {NewLine} {Exception}").CreateLogger();Log.Information($"{DateTime.Now},LogLevel.Information,program started!");Log.Warning($"{DateTime.Now},LogLevel.Warning,This is warning!");Log.Error($"{DateTime.Now},LogLevel.Error,This is error!");Console.WriteLine($"{DateTime.Now},Press any key to exit.");Console.ReadKey();}catch (Exception ex){ Log.Fatal(ex, $"{DateTime.Now},{ex.Message}");}finally{Log.CloseAndFlush();}}} }
2026-03-30 23:15:58.655 [INF] 2026-03-30 23:15:58,LogLevel.Information,program started! 2026-03-30 23:15:58.694 [WRN] 2026-03-30 23:15:58,LogLevel.Warning,This is warning! 2026-03-30 23:15:58.696 [ERR] 2026-03-30 23:15:58,LogLevel.Error,This is error!