how to create datatable dynamically in asp.net

Create DataTable

 DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Id"));
        dt.Columns.Add(new DataColumn("Name"));
        dt.Columns.Add(new DataColumn("Loc"));

        DataRow dr = dt.NewRow();
        dr[0] = "1";
        dr[1] = "siva";
        dr[2]="hyd";

        DataRow dr1 = dt.NewRow();
        dr1[0] = "2";
        dr1[1] = "krishna";
        dr1[2]="delhi";

        DataRow dr2 = dt.NewRow();
        dr2[0] = "3";
        dr2[1] = "ravi";
        dr2[2]="banga";

dt.Rows.Add(dr1);
dt.Rows.Add(dr2);
dt.Rows.Add(dr3);

//Now we have added a single row to the data table, you can use this datatable to populate a grid view or //other data presentation controls

GridView1.DataSource = dtHome;
GridView1.DataBind();
(or)
RadioButtonList1.DataSource = dt;     
        RadioButtonList1.DataTextField = "Name";     
        RadioButtonList1.DataValueField = "Id";
        RadioButtonList1.DataBind();
        RadioButtonList1.Items.Insert(0, "select one ");
(or)
CheckBoxList1.DataSource = dt;
        CheckBoxList1.DataTextField = "Name";
        CheckBoxList1.DataValueField = "Id";
        CheckBoxList1.DataBind();
        CheckBoxList1.Items.Insert(0, "select ");