ToUniversalTime() Isn't Reliable, always use TimzoneInfo.ConvertXXX methods

ToUniversalTimeIsntReliable.cs

public class Program
{
	public static void Main()
	{
		Console.WriteLine(TimeZoneInfo.ConvertTimeToUtc(new DateTime(2019,2,2, 0,0,0), TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time")));
		Console.WriteLine(TimeZoneInfo.ConvertTimeToUtc(new DateTime(2019,2,2, 23,59,59), TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time")));
		Console.WriteLine(new DateTime(
                2019, 
                2, 
                2, 
                0, 
                0, 
                0).ToUniversalTime());
		Console.WriteLine(new DateTime(
                2019, 
                2, 
                2, 
                23, 
                59, 
                59).ToUniversalTime());		
	}
  
  public static void EchoSystemTimezones()
  {
      foreach (var info in TimeZoneInfo.GetSystemTimeZones())
		  {
		  	Console.WriteLine(info + "|" + info.Id);
		  }
  }
	
	public static DateTimeOffset ConvertToUtcDateTimeOffset(DateTimeOffset? date)
  {
       return date.HasValue ? TimeZoneInfo.ConvertTimeToUtc(date.Value.DateTime) : DateTimeOffset.UtcNow;
  }
}