Using yield in C#

Question

I have a vague understanding of the yield keyword in c#, but I haven\'t yet seen the need to use it in my code. This probably comes from a lack of understanding of

Answer 1

Yield is used in enumerators. The C# compiler automatically pauses execution of your enumeration loop and returns the current value to the caller.

IEnumerable GetIntegers(int max) {
    for(int i = 1; i <= max) {
         yield return i; // Return current value to the caller
    }
}

-- or (more clunky) --

IEnumerable GetIntegers(int max) {
    int count = 0;
    while(true) {
         if(count >= max) yield break; // Terminate enumeration

         count++;
         yield return count; // Return current value to the caller
    }
}

More details on MSDN.