... Example 10- 15 asks for four digitsafter the decimal point.Example 10- 15. Fixed-point formatdouble amount = 152 .683 854 85; string text = amount.ToString("F4");This produces: 152 .6839The ... in:13:1413:1413:14: 15 13:14: 15 Or, as Example 10- 35 shows, you can combine the two.Example 10- 35. Getting both the time and dateDateTime time = new DateTime(2001, 12, 24, 13, 14, 15, 16);Console.WriteLine(time.ToString("g"));Console.WriteLine(time.ToString("G"));Console.WriteLine(time.ToString("f"));Console.WriteLine(time.ToString("F"));Notice ... can create a new string by composing one or more other strings. Example 10 -55 shows one way to do this.Example 10 -55 . Concatenating stringsstring fragment1 = "To be, ";string fragment2...