¿Cómo agrego un control a un contenedor en un WinForm heredado?

Tengo un formulario base en otro proyecto que impone la misma apariencia a todos nuestros programas WinForms. Heredé de ese BaseForm, para crear mi propia plantilla, BaseView. Esta plantilla mía tiene controles adicionales como ProgressBar, Timer y TableLayoutPanel.

Ahora quiero heredar de mi BaseView y usar el Diseñador para agregar mis controles específicos del programa, sin embargo, no puedo colocar nada como Paneles o cualquier otro Control en él. He intentado algunas sugerencias, como asegurarme de que los componentes del formulario base sean públicos, pero en vano, la mayoría de las propiedades del TLP todavía están atenuadas.

¿Alguien me puede dar alguna sugerencia? ¡Muchas gracias!

partial class BaseView
{
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(BaseView));
        this.tableLayoutPanel_Form = new System.Windows.Forms.TableLayoutPanel();
        this.panel_Buttons = new System.Windows.Forms.Panel();
        this.panel_MainBody = new System.Windows.Forms.Panel();
        this.progressBar = new System.Windows.Forms.ProgressBar();
        this.timer_ProgressBar = new System.Windows.Forms.Timer(this.components);
        this.tableLayoutPanel_Form.SuspendLayout();
        this.SuspendLayout();
        // 
        // lblFormId
        // 
        this.lblFormId.AutoSize = false;
        this.lblFormId.Location = new System.Drawing.Point(390, 9);
        this.lblFormId.Size = new System.Drawing.Size(98, 13);
        this.lblFormId.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
        // 
        // btnClose
        // 
        this.btnClose.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
        this.btnClose.DialogResult = System.Windows.Forms.DialogResult.Cancel;
        this.btnClose.Location = new System.Drawing.Point(447, 5);
        this.btnClose.Size = new System.Drawing.Size(41, 21);
        this.btnClose.TabIndex = 4;
        // 
        // tableLayoutPanel_Form
        // 
        this.tableLayoutPanel_Form.ColumnCount = 1;
        this.tableLayoutPanel_Form.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
        this.tableLayoutPanel_Form.Controls.Add(this.panel_Buttons, 0, 2);
        this.tableLayoutPanel_Form.Controls.Add(this.panel_MainBody, 0, 1);
        this.tableLayoutPanel_Form.Dock = System.Windows.Forms.DockStyle.Fill;
        this.tableLayoutPanel_Form.Location = new System.Drawing.Point(0, 0);
        this.tableLayoutPanel_Form.Name = "tableLayoutPanel_Form";
        this.tableLayoutPanel_Form.RowCount = 3;
        this.tableLayoutPanel_Form.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 30F));
        this.tableLayoutPanel_Form.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
        this.tableLayoutPanel_Form.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 30F));
        this.tableLayoutPanel_Form.Size = new System.Drawing.Size(496, 322);
        this.tableLayoutPanel_Form.TabIndex = 26;
        // 
        // panel_Buttons
        // 
        this.panel_Buttons.Dock = System.Windows.Forms.DockStyle.Fill;
        this.panel_Buttons.Location = new System.Drawing.Point(3, 295);
        this.panel_Buttons.Name = "panel_Buttons";
        this.panel_Buttons.Size = new System.Drawing.Size(490, 24);
        this.panel_Buttons.TabIndex = 0;
        // 
        // panel_MainBody
        // 
        this.panel_MainBody.Dock = System.Windows.Forms.DockStyle.Fill;
        this.panel_MainBody.Location = new System.Drawing.Point(3, 33);
        this.panel_MainBody.Name = "panel_MainBody";
        this.panel_MainBody.Size = new System.Drawing.Size(490, 256);
        this.panel_MainBody.TabIndex = 1;
        // 
        // progressBar
        // 
        this.progressBar.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
        this.progressBar.Location = new System.Drawing.Point(383, 324);
        this.progressBar.Name = "progressBar";
        this.progressBar.Size = new System.Drawing.Size(112, 21);
        this.progressBar.TabIndex = 27;
        // 
        // timer_ProgressBar
        // 
        this.timer_ProgressBar.Interval = 700;
        this.timer_ProgressBar.Tick += new System.EventHandler(this.timer_Tick);
        // 
        // BaseView
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.CancelButton = this.btnClose;
        this.ClientSize = new System.Drawing.Size(496, 346);
        this.Controls.Add(this.progressBar);
        this.Controls.Add(this.tableLayoutPanel_Form);
        this.Cursor = System.Windows.Forms.Cursors.Default;
        this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
        this.MinimumSize = new System.Drawing.Size(512, 384);
        this.Name = "BaseView";
        this.Controls.SetChildIndex(this.btnClose, 0);
        this.Controls.SetChildIndex(this.tableLayoutPanel_Form, 0);
        this.Controls.SetChildIndex(this.lblFormId, 0);
        this.Controls.SetChildIndex(this.lblFormDescription, 0);
        this.Controls.SetChildIndex(this.progressBar, 0);
        this.tableLayoutPanel_Form.ResumeLayout(false);
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    #endregion

    private System.Windows.Forms.ProgressBar progressBar;
    private System.Windows.Forms.Timer timer_ProgressBar;
    public System.Windows.Forms.TableLayoutPanel tableLayoutPanel_Form;
    public System.Windows.Forms.Panel panel_Buttons;
    public System.Windows.Forms.Panel panel_MainBody;
}

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