extensions.cs

public static class Extensions { 
  public static int Megabytes(this int value) { 
    return value * 1024 * 1024; 
  } 

  public static int Kilobytes(this int value) { 
    return value * 1024; 
  } 

  public static int Days(this int value) { 
    return value * 24 * 60 * 60 * 1000; 
  } 

  public static DateTime Ago(this int value) { 
    return DateTime.Now.AddMilliseconds(-value); 
  } 
}