1 using System; 2 using System.Linq; 3  4 namespace Linq101 5 { 6     class Conversion 7     { 8         /// <summary> 9         /// This sample uses ToArray to immediately evaluate a sequence into an array.10         /// </summary>11         public void Linq54()12         {13             double[] doubles = { 1.7, 2.3, 1.9, 4.1, 2.9 };14 15             //var doublesArray = doubles.OrderByDescending(d => d).ToArray();16             var sortedDoubles = from d in doubles17                                 orderby d descending18                                 select d;19             var doublesArray = sortedDoubles.ToArray();20 21             Console.WriteLine("Every other double from highest to lowest:");22             for (int d = 0; d < doublesArray.Length; d += 2)23             {24                 Console.WriteLine(doublesArray[d]);25             }26         }27 28         /// <summary>29         /// This sample uses ToList to immediately evaluate a sequence into a List<T>.30         /// </summary>31         public void Linq55()32         {33             string[] words = { "cherry", "apple", "blueberry" };34 35             //var wordList = words.OrderBy(w => w).ToList();36             var sortedWords =37                 from w in words38                 orderby w39                 select w;40             var wordList = sortedWords.ToList();41 42             Console.WriteLine("The sorted word list:");43             foreach (var w in wordList)44             {45                 Console.WriteLine(w);46             }47         }48 49         /// <summary>50         /// This sample uses ToDictionary to immediately evaluate a sequence and a related key expression into a dictionary.51         /// </summary>52         public void Linq56()53         {54             var scoreRecords = new[] { new {Name = "Alice", Score = 50}, 55                                 new {Name = "Bob"  , Score = 40}, 56                                 new {Name = "Cathy", Score = 45} 57                             };58 59             var scoreRecordsDict = scoreRecords.ToDictionary(s => s.Name);60 61             Console.WriteLine("Bob‘ Score: {0}", scoreRecordsDict["Bob"].Score);62         }63 64         /// <summary>65         /// This sample uses OfType to return only the elements of the array that are of type double.66         /// </summary>67         public void Linq57()68         {69             object[] numbers = { null, 1.0, "two", 3, "four", 5, "six", 7.0 };70 71             var doubles = numbers.OfType<double>();72 73             Console.WriteLine("Numbers stored as doubles:");74             foreach (var d in doubles)75             {76                 Console.WriteLine(d);77             }78         }79     }80 }