filling table by yield return

Dear, I  started adventure with C# a month ago. Can You please help me with problem below?

How to insert the results obtained by Yield return and insert them into table correctly? As far as result I get the table filled by the same,last generated value (10+5=15). What I need is to have series of results generated step by step by "yield return" function.

 

 
        public class Obliczenia
        {
            // double P1, P2, V, S, R, P1a, Sa, Va;
            public IEnumerable<double> Wyniki
            {
                get
                {
                    for (double Rf = 0; Rf <= 10; Rf += 1)
                    {
                        yield return Rf + 5; // finally here will be more complicated equation
                    }
                }
            }

        string[] tablica1 = new string[100];

            Obliczenia o = new Obliczenia();
           
            foreach (double wynik in o.Wyniki)
            {

                for (int i = 0; i < 9; ++i)
                {

                    tablica1[i] = wynik.ToString();     //I think, something wrong is here.
                }