Yesterday

Returns yesterday's DateTime value.

• Use DateTime.Now to get the current date, then use DateTime.AddDays(-1) to decrement by 1.

public static partial class _30s 
{
  public static DateTime Yesterday() 
  {
    return DateTime.Now.AddDays(-1);
  }
}

_30s.Yesterday(); // 12/20/2019 11:00:49 AM (if it's 12/21/2019 11:00:49 AM)