Yield Return Example

YieldReturnExample.cs

class Program
{
    static void Main(string[] args)
    {
        var numbers = LoadNumbersUsingList(1, 10);
        WriteNumbers(numbers);
        numbers = LoadNumbersUsingYield(1, 10);
        WriteNumbers(numbers);
        Console.ReadLine();
    }

    static IEnumerable<int> LoadNumbersUsingList(int minimum, int maximum)
    {
        List<int> numbers = new List<int>(maximum - minimum);
        for (int i = minimum; i <= maximum; i++)
            numbers.Add(i);
        return numbers;
    }

    static IEnumerable<int> LoadNumbersUsingYield(int minimum, int maximum)
    {
        for (int i = minimum; i <= maximum; i++)
            yield return i;
    }

    static void WriteNumbers(IEnumerable<int> numbers)
    {
        foreach (int number in numbers)
            Console.WriteLine(number);
    }
}