Linq
March 08, 2011
This is just a quick sample to show you can use Linq in 2 different yet identical ways.
The task is to show the count of people that have the same ages in our sample input data
1: class Program
2: {
3: class Person
4: {
5: public string Name { get; set; }
6: public int Age { get; set; }
7: }
8: static void Main(string[] args)
9: {
10: // some test data
11: var info = new List {
12: new Person { Name = "Brian", Age = 34 }, new Person { Name = "Dee", Age = 29 },
13: new Person { Name = "Bob", Age = 21 }, new Person { Name = "Dave", Age = 25 },
14: new Person { Name = "Tim", Age = 33 }, new Person { Name = "Jacques", Age = 43 },
15: new Person { Name = "Simon", Age = 33 }, new Person { Name = "Jame", Age = 34 },
16: new Person { Name = "Jason", Age = 34 }, new Person { Name = "Niamh", Age = 34 }};
17:
18: var duplicates = from p in info
19: group p by p.Age into g
20: where g.Count() > 1
21: select g;
22: Print(duplicates);
23:
24: var dups = info.GroupBy(p => p.Age).Where(p => p.Count() > 1);
25: Print(duplicates);
26: }
27:
28: static void Print(IEnumerableint, Person>> obj)
29: {
30: obj.ToList().ForEach(p => Console.WriteLine(p.Key + ":" + p.Count()));
31: }
32: }