how to add new row in tablelayoutpanel at runtime

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C#

C#4.0

dear

I want to add new row in table layout panel with existing rows.I tried the following code.It didn't work. it works but not adding the rows at the end of the existing row. I want, if user click the last text box in a row the new row will generate automatically after that row.please help

tableLayoutPanel2.GrowStyle = TableLayoutPanelGrowStyle.AddRows;
            tableLayoutPanel2.AutoSize = true;

            int InsertRowNum = tableLayoutPanel2.RowCount;
            int InsertColumnNum = tableLayoutPanel2.ColumnCount;
            tableLayoutPanel2.AutoScroll = true;
            tableLayoutPanel2.Visible = true;

            RowStyle newRowStyle = new RowStyle();
            newRowStyle.SizeType = SizeType.Absolute;
            newRowStyle.Height = 30;
            tableLayoutPanel2.RowStyles.Insert(InsertRowNum, newRowStyle);

            tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(SizeType.Absolute, 30));
             //Add controls to the new row
            tableLayoutPanel2.Controls.Add(textBox1, InsertRowNum + 1, 0);
            tableLayoutPanel2.Controls.Add(textBox1, InsertRowNum, 1);
            tableLayoutPanel2.Controls.Add(comboBox1, InsertRowNum, 2);
            tableLayoutPanel2.Controls.Add(comboBox1, InsertRowNum, 3);



            for (int row = tableLayoutPanel2.RowCount; row <= tableLayoutPanel2.RowCount; row++)
            {
                for (int column = 0; column < tableLayoutPanel2.ColumnCount - 2; column++)
                {
                    TextBox textBox = new TextBox();
                    textBox.Text = string.Format("", column, row);
                    tableLayoutPanel2.Controls.Add(textBox3, 5, 0);
                }

            }


            //tableLayoutPanel2.TabIndex++;
           tableLayoutPanel2.Visible = true;
        }