using System; using System.Collections.Generic; using System.Collections; using System.Linq; using System.Text; using System.Threading.Tasks; using static SoloLearn.Printer; //IN ORDER TO UNDERSTAND IEnumerable: //1.Read Main all they way through //run the code //2.Look at the Printer class //notice how I inject IEnumerable //as a parameter type //realize you can print //any iterable object or make your own!! //3. Look at the BoolArray and CustomList //classes. CustomList is for Generic types //Bool Array is for non-generic types. namespace SoloLearn { class Program { static void Main(string[] args) { //__________\\ CustomList cl = new CustomList//IEnumerable { 1,4,2,6 }; cl.Show(); //____\\ //you can also do this IEnumerable cl2 = new CustomList { 1,6,3,6 }; cl2.Show(); //_____\\ var arr = new int[]//IEnumerble { 1,2,3, 5 }; arr.Show(); //________\\ var list = new List//IEnumerable { 4,6,2,5 }; list.Show(); //_____\\ var ba = new BoolArray//IEnumerable { true,false,true }; ba.Show(); } } //generic IEnumerable example class CustomList : IEnumerable { private List l; public CustomList() { l = new List(); } public void Add(T item) { l.Add(item); } public IEnumerator GetEnumerator() { foreach(T item in l) { yield return item; } } IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); } } public class BoolArray:IEnumerable { private List l; public BoolArray() { l = new List(); } public void Add(bool item) { l.Add(item); } public IEnumerator GetEnumerator() { foreach(bool item in l) { yield return item; } } } public static class Printer { public static void Show(this IEnumerable l)//The IEnumerable lets me print out a List,Array,CustomList or any class the uses the IEnumerable interface!Neat! { Console.WriteLine(); Console.WriteLine(l.GetType()); foreach(T item in l) { Console.WriteLine(item); } } public static void Show(this IEnumerable l)//prints any class that uses IEnumerable such as BoolArray or any Interface that uses IEnumerable { Console.WriteLine(); Console.WriteLine(l.GetType()); foreach(var item in l) { Console.WriteLine(item); } } } }

IEnumerable Example