1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4
5 namespace Linq101
6 {
7 class CustomSequence
8 {
9 public void Linq98()
10 {
11 int[] vectorA = { 0, 2, 4, 5, 6 };
12 int[] vectorB = { 1, 3, 5, 7, 8 };
13
14 int result = vectorA.Combine(vectorB, (a, b) => a * b).Sum();
15 Console.WriteLine(result);
16 }
17 }
18
19 public static class CustomSequenceOperators
20 {
21 public static IEnumerable<int> Combine(this IEnumerable<int> first, IEnumerable<int> second, Func<int, int, int> func)
22 {
23 //List<int> list=new List<int>();
24 using (IEnumerator<int> e1 = first.GetEnumerator(), e2 = second.GetEnumerator())
25 {
26 while (e1.MoveNext() && e2.MoveNext())
27 {
28 yield return func(e1.Current, e2.Current);
29 //list.Add(func(e1.Current, e2.Current));
30 }
31 }
32 //return list;
33 }
34 }
35 }
