using System;

public class Rectangle
{
    public double Length { get; set; } = 1;
    public double Width { get; set; } = 1;
    public double Area { get; set; } = CalculateArea(1, 1);

    public static double CalculateArea(double length, double width)
    {
        return length * width;
    }
}

public class FingerPrint
{
  public DateTime TimeStamp { get; } = DateTime.UtcNow;

  public string User { get; } =
    System.Security.Principal.WindowsPrincipal.Current.Identity.Name;

  public string Process { get; } =
    System.Diagnostics.Process.GetCurrentProcess().ProcessName;
}

public class Test
{
	public static void Main()
	{
		// your code goes here
	}
}