optional.cs

public void WriteLog(string message,
	Severity severity = Logger.Defaults.Severity,
	Encoding = Logger.Defaults.Encoding,
	Color = Logger.Defaults.Color)
{
	/*Write your log here*/
}

public void Main()
{
	WriteLog("I am a debug message", Severity = Severity.Debug);
	WriteLog("This message is blue and actually Shift-JIS", Color = Color.Blue, Encoding = Encoding.ShiftJIS);
}