How to use Yield statement in C#

Introduction

Yield statement is one of most interesting statement in the C# 2.0. I have heard about lot of yield statement but today i have learned about yield statement. Yield statement can be used to return multiple object from a method while retaining its state. You can get item in sequence with help of yield.Let take a simple example to see the power or yield statement.

Let's create one example which will help you the understand how its works Let create a function will return the square each time this function is called.

public static IEnumerable<int> Square(int min, int max)
{
for (int i = min; i < max; i++)
{
yield return i*i;
}
}

 Now each time this method is called it will return the square of current value within a given range and its also maintains the state between calls. Let create for each loop to call the the square function above.

foreach (int i in Square(1, 10))
{
Response.Write(i.ToString() + " ");
}

 And here will be the output in the browser. 

i hope this is help to  you all. enjoy the new keyword "Yield".