private void btnStart_Click(object sender, EventArgs e)
        {
            NewKmeans     kmeans = new NewKmeans();
            StringBuilder sb     = NewKmeans.kmeanstoo();

            this.txtData.Text = sb.ToString();

            List <NewKmeans.XY> dsList = new List <NewKmeans.XY>();

            dsList = NewKmeans.CreateDataSet();

            String listds = String.Empty;

            foreach (NewKmeans.XY XY in dsList)
            {
                listds += "(" + XY.XToString + "  " + XY.YToString + ") , ";
            }//end foreach

            //this.txtData.Text = listds;


            this.dataGridView1.DataSource = dsList;
        }