Using random rnd inside a method causes multiple errors

Having problem with the method down below. The current error I get is "it does not return any value" If I put the return num outside of the brackets, it does not exist in the current context. If I remove the brackets all together I get:

Embedded statement cannot be a declaration or labeled statement The name 'rnd' does not exist in the current context

I've done multiple methods before without this issue. What am I missing?

 public static int generateNumber(int timesUserWantsToGuess)
        {
            for (int i = 0; i <= timesUserWantsToGuess; i++)
            {
                Random rnd = new Random();
                int num = rnd.Next(1, 50);
                return num;
            }


        }