DateTime.AddMilliseconds(Double) C# with Example

string dateFormat = "MM/dd/yyyy hh:mm:ss.fffffff"; 
DateTime date1 = new DateTime(2010, 9, 8, 16, 0, 0); 
Console.WriteLine("Original date: {0} ({1:N0} ticks)\n", 
date1.ToString(dateFormat), date1.Ticks); 
DateTime date2 = date1.AddMilliseconds(1); 
Console.WriteLine("Second date: {0} ({1:N0} ticks)", 
date2.ToString(dateFormat), date2.Ticks); 
Console.WriteLine("Difference between dates: {0} ({1:N0} ticks)\n", 
date2 - date1, date2.Ticks - date1.Ticks); 
DateTime date3 = date1.AddMilliseconds(1.5); 
Console.WriteLine("Third date: {0} ({1:N0} ticks)", 
date3.ToString(dateFormat), date3.Ticks); 
Console.WriteLine("Difference between dates: {0} ({1:N0} ticks)", 
date3 - date1, date3.Ticks - date1.Ticks);