C # Collections

1. The type of the collection to implement the Ienumerator,ienumerable interface to use foreach. The types of collections include the array ArrayList list Hastabale dictionary sortlist stack queue

2.Array

A. General array int[] a=new int[4];int []a=new int[4]{1,2,3,4};int[]a={1,2,3,4};

B. Multidimensional array int[,] a=new int[2,3]; int[,] a={{1,2},{2,3}}

C. Array of arrays int[][]a=new int[2][]; int a[][]={new int[]{1,2,3},new int[]{1,2,3,4}};

2.ArrayList and List

ArrayList can store any type list can only store the specified type

3.hashtable,dictionary

Hashtable can store any type of key-value pair, dictionary can only store key-value pairs of the specified type

4.SortedList

List sorted by key

5.Stack Queue

Stacks together, queues. Have their own methods.

C # Collections