IEnumerable . What T stands for?, pls help me out.

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hi, usually if we want use Inumerable, we will use follows.

C#

class program

{

static void main(string[] args)

{

List<int> oyears=new List<int>();

oyears.Add(100);

oyears.Add(101);

oyears.Add(102);

}

IEnumerable<int> enum=(IEnumerable<int>) oyears;

foreach(int i in enum)

{

console.wriline(i);

}

output :

101

102.

here IEnumerable<int> , int is datatype. so What is IEnumerable<T>. here T is What or stands for?..please help me out.

Posted 29-Aug-13 21:14pm

christhuxavier

Updated 29-Aug-13 21:49pm

phil.o

v2

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Maarten Kools · Answer 1 · 2013-08-29T21:19:00

Solution 2

The IEnumerable<T> interface is basically a type-safe IEnumerable. The T in this case is a so called generic type parameter. It defines that the IEnumerable will contain objects of type T.

There's a lot of resources to find on using generics on the internet, here's some to get started:

Introduction to Generics (C# Programming Guide)[^]
Difference between IEnumerable and IEnumerable<T>[^]
C# IEnumerable[^]

Posted 29-Aug-13 21:19pm

Maarten Kools

Updated 29-Aug-13 21:25pm

v2

Comments

Thomas Daniels 30-Aug-13 3:26am

+5!

I also edited your answer, because the <T> was not visible because it was treated as a HTML tag.

Maarten Kools 30-Aug-13 6:06am

Oh it was? It looked fine in the preview, I hadn't checked the final result to be honest (busy, busy) :/ Thanks!

TheUltimateDebugger · Answer 2 · 2013-08-29T21:18:00

Solution 1

IEnumerable<t> is an interface - you can't create an IEnumerable<t>, but rather must create some class that implements IEnumerable<t></t></t></t>

Posted 29-Aug-13 21:18pm

TheUltimateDebugger