What is the output of the program below? Explain your answer.

Brahma Prakash Shukla

3.4k

delegate void writer();

static void Main()
{
List writers = new List();
int i=0;
for(; i < 10; i++)
{
writers.Add(delegate { Console.WriteLine(i); });
}

 foreach (var writer in writer)
 {
        writer();
 }

}

The answer is
10
10
10
10
10
10
10
10
10
10

It will print 10 in 10 times in loop. Beacuse delegate is refrence type.

NOTE : To compile this code we need to do some correction in code as below.
Replace - List writers = new List();
TO
List writers = new List();

and

Replace - foreach (var writer in writer)
TO
foreach (var writer in writers)

Exception thrown. The list is “writers”, and in loop it’s “writer”.