var logglyKey = "125125125125125125125125"; // whatever your loggly key is
 var tags = new []{"PROD", "MyCoolApp"};
 var logger = new LoggerConfiguration()
      .MinimumLevel.Verbose()
      .WriteTo.LogglyBulk(logglyKey, tags, batchPostingLimit: 10000, period: TimeSpan.FromSeconds(10))
      .CreateLogger();