VB.Net by API/System.Globalization/DateTimeFormatInfo

DateTimeFormatInfo.AMDesignator()

  
public class Test
   public Shared Sub Main
        Dim Provider As New System.Globalization.DateTimeFormatInfo()
        Console.WriteLine(Provider.AMDesignator())
        Console.WriteLine(DateTime.ParseExact("12:42", "hh:mm", Provider))
   End Sub
End class

DateTimeFormatInfo.ParseExact

  
public class Test
   public Shared Sub Main
        Dim Provider As New System.Globalization.DateTimeFormatInfo()
        Console.WriteLine(Provider.AMDesignator())
        Console.WriteLine(DateTime.ParseExact("12:42", "hh:mm", Provider))
   End Sub
End class