Add control at the last in tablelayoutpanel c#

Question

When I add a control to a tablelayout panel, it inserts the control at the beginning of the panel instead of at the last.

              tableLayoutPanel1.Controls.Add(mTAButtonRounded, tableLayoutPanel1.ColumnCount + 1, 0);
                tableLayoutPanel1.ColumnStyles.Clear();
                for (int i = 0; i < tableLayoutPanel1.ColumnCount; i++)
                {
                    tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
                }
    
    

Answer 1

If I do a test, the Button is inserted in last column/last row =>

    private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;  
    private System.Windows.Forms.Button button1;  

then :

        tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();  
        
        tableLayoutPanel1.ColumnCount = 3;  
        tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33F));  
        tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33F));  
        tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33F));  
        tableLayoutPanel1.Location = new System.Drawing.Point(10, 10);  
        tableLayoutPanel1.Name = "tableLayoutPanel1";  
        tableLayoutPanel1.RowCount = 5;  
        tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 20F));  
        tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 20F));  
        tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 20F));  
        tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 20F));  
        tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 20F));  
        tableLayoutPanel1.Size = new System.Drawing.Size(400, 200);  
        tableLayoutPanel1.CellBorderStyle = TableLayoutPanelCellBorderStyle.Outset;  

        button1 = new System.Windows.Forms.Button();  
        button1.Name = "button1";  
        button1.Text = "button1";  
        button1.UseVisualStyleBackColor = true;  
        tableLayoutPanel1.Controls.Add(button1, tableLayoutPanel1.ColumnCount -1, tableLayoutPanel1.RowCount -1);  

        Controls.Add(tableLayoutPanel1);