Updating values. Work in debug stepping else wrong numbers ?

private static void MakeParticles(StreamWriter srfile, Hashtable hashtable)
    {
        double []x; //= 0.0d;
        double []y; //= 0.0d;
        double []z; //= 0.0d;

        double r,theta;
        double dz;
        int particle = 0;
        int i = 0;
        int j=0;
        int k = 0;
        x = new double[40];
        y = new double[40];
        z = new double[40];
       double kurt;
       foreach (WellData well in hashtable.Values)
       {
           k = k + 1;
           LogFile.Write("For well: {0}",well.WellID);
           dz = (well.Top_filter - well.Bottom_filter) / 10d;
           // random Z
           for (j = 0; j < 10; j++)
           {
               srfile.Flush();

               for (i = 0; i < 40; i++)
               {
                   r = 25d * RandomNumber();
                   theta = 2d * Math.PI * RandomNumber();
                   x[i] = well.X + r * Math.Cos(theta);
                   y[i] = well.Y + r * Math.Sin(theta);
                   z[i] = well.Bottom_filter + dz * RandomNumber();
                   kurt = (x[i] + y[i] + z[i]);
                   Console.WriteLine("kurt is {0}",kurt.ToString("F3"));
               }
                for (i = 0; i < 40; i++)
               {
              //     Console.WriteLine("0 0 0 {0} {1} {2} 0 0 0 0", x[i].ToString("F2"), y[i].ToString("F2"), z[i].ToString("F2"));
                   srfile.WriteLine("0 0 0 {0} {1} {2} 0 0 0 0", x[i].ToString("F2"), y[i].ToString("F2"), z[i].ToString("F2"));
                   srfile.Flush();
                }
           }
           LogFile.WriteLine("\thave released particle:\t {0} to {1}", (particle+1).ToString(), (particle + (i * j)).ToString());
           particle = (i*j)*k;

           // i     j   k   x       y       z      icode,  jcode,  kcode   TRELAES
           // 78    6   2   0.5     0.5    1.0     0       0       0        0.0
           LogFile.Flush();
           srfile.WriteLine("::::::::::::::::::::::::::::::::::::::::::::");
           srfile.Flush();

       }

    }
}