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Introduction to IEnumerable C# Syntax of IEnumerable C#

The syntax is as follows:

public interface IEnumerable

The collection is iterated using the movenext() and reset() methods.

Extension Methods in IEnumerable C#

Below are the methods:

AsParallel(IEnumerable): This is used to enable the running of parallel queries.

AsQueryable(IEnumerable): This is used to convert IEnumerable interface to IQueryable interface.

Examples to Implement of IEnumerable C#

Below are the examples:

Example #1

Code:

using System; using System.Diagnostics; using System.Reflection; using System.Collections; namespace TestEg { class Test : IEnumerable { Test[] coll = null; int Fi = 0; public String Fname { get; set; } public string lastnme { get; set; } public Test() { coll = new Test[10]; } public void Add(Test item) { coll[Fi] = item; Fi++; } public IEnumeratorGetEnumerator() { foreach (object o in coll) { if(o == null) { break; } yield return o; } } } class Program { public static void Main(String[] args) { Test tobj = new Test(); tobj.Fname = "viki"; tobj.lastnme = "krish"; Test tobj1 = new Test(); tobj1.Fname = "nand"; tobj1.lastnme = "viki"; Test myList = new Test(); Test tobj2 = new Test(); tobj2.Fname = "vyapini"; tobj2.lastnme = "viki"; Test tobj3 = new Test(); tobj3.Fname = "tai"; tobj3.lastnme = "viki"; myList.Add(tobj); myList.Add(tobj1); myList.Add(tobj2); myList.Add(tobj3); foreach (Test obj in myList) { Console.WriteLine("Fname:" +  obj.Fname + "tt" + "lastnme :" + obj.lastnme); } Console.ReadLine(); } } }

Output:

Example #2

Code:

using System; using System.Diagnostics; using System.Reflection; using System.Collections; public class test : IEnumerable { public string Student1 { get; set; } public string Student2 { get; set; } public string Student3 { get; set; } public IEnumeratorGetEnumerator() { return new testEnumerator(this); } } public class testEnumerator : IEnumerator { public testEnumerator(test ts) { _ts = ts; } private test _ts; private int _index = 0; public void Reset() { _index = 0; Current = null; } public object Current { get; private set; } public bool MoveNext() { _index++; /**/ if (_index == 1) { Current = _ts.Student1; return true; } else if (_index == 2) { Current = _ts.Student2; return true; } else if (_index == 3) { Current = _ts.Student3; return true; } else return false; } } class Program { public static void Main(String[] args) { varts = new test() {Student1 = "vignesh", Student2 = "nandhini", Student3 = "vyapini"}; foreach (string name in ts) { Console.WriteLine(name); } } }

Output:

Example #3

Code:

using System.Linq; using System.Collections.Generic; using System; namespace TestOper { public class testclass { public inteid { get; set; } public string ename { get; set; } public double salary { get; set; } } class Program { public static void Main() { { new testclass { eid= 1001, ename = "viki", salary = 1000 }, new testclass { eid= 1002, ename = "nandhini", salary = 600 }, new testclass { eid= 1003, ename = "vyapinin", salary = 10000 } }; { Console.WriteLine("eid" + chúng tôi + " ename : " + kvp.Value.ename + ", salary: " + kvp.Value.salary); } Console.ReadKey(); } } }

Output:

Example #4

Code:

using System; using System.Collections.Generic; using System.Linq; class Program { static void Main() { int[] numbers = new int[] { 1,13,51,75 }; { Console.WriteLine(pair); } { "vignesh","jagan","nyan","ravi","siva","sethu" }; if (result.ContainsKey("jagan")) { Console.WriteLine("name exists"); } } }

Example #5

Code:

using System; using System.Collections.Generic; using System.Linq; namespace LINQDemo { class Program { static void Main(string[] args) { { new emp(){empid = 1, empname = "James", empgender = "Male",eage=60}, new emp(){empid = 2, empname = "Sara", empgender = "Female",eage=90}, new emp(){empid = 3, empname = "Steve", empgender = "Male",eage=80}, new emp(){empid = 4, empname = "Pam", empgender = "Female",eage=70}, new emp(){empid = 5, empname = "James", empgender = "Male",eage=60}, new emp(){empid = 6, empname = "Sara", empgender = "Female",eage=50}, new emp(){empid = 7, empname = "Steve", empgender = "Male",eage=20}, new emp(){empid = 8, empname = "Pam", empgender = "Female",eage=40} }; foreach (varemp in iq) { Console.WriteLine( $"empid : {emp.empid}  empname : {emp.empname} eage : {emp.eage} empgender : {emp.empgender} "); } Console.ReadKey(); } } public class emp { public intempid { get; set; } public string empname { get; set; } public string empgender { get; set; } public inteage { get; set; } } }

Output:

Conclusion Recommended Articles

This is a guide to IEnumerable C#. Here we discuss a brief overview on IEnumerable C# and its Examples along with its Code Implementation. You can also go through our other suggested articles to learn more –

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