Is while(condition) { yield return null;} safe?

Hello. I wonder which is better safely on commercial projects "yield return condition;" with
"while(condition) { yield return null;}". Thanks.

 

Code (CSharp):

1. //This loop will go infinitely.
2. while(true){
3.     //Stuff here
4. }
5. //This loop can only go 10 times
6. int x = 0;
7. while(x < 10){
8.     x += 1;
9. }

while loops are safe as long as there is a very rare or never chance they will run infinitely

 

while loops are perfectly safe withing co-routines as long as you yield. Even while(true) loops.

 

Thank you for all replies.