C# WinApp อยาก fixsize usercontrol ไม่ให้เปลี่ยน หรือให้เปลี่ยนตาม ฟรอน ยังไงครับ

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AutAppCenter
{
    public partial class UserControl1 : UserControl
    {
        private int defaultTextBoxHeight;
        private int defaultTextBoxWidth;
        public UserControl1()
        {
            InitializeComponent();
            defaultTextBoxHeight = 20;
            defaultTextBoxWidth = 199;
           
        }
//โค้ดส่วนนี้ได้มาจากเน็ต เลยเอามาปรับแก้ไขทำตัวอย่างให้ดูครับ
        protected override void SetBoundsCore(
    int x, int y, int width, int height, BoundsSpecified specified)
        {
         
            if ((specified & BoundsSpecified.Height) == 0 || height == defaultTextBoxHeight+50)
            {
                base.SetBoundsCore(x, y, defaultTextBoxWidth + 100, defaultTextBoxHeight + 20, specified);
            }
            else
            {
                return; 
            }
        }

        [Description("Test text displayed in the textbox"), Category("Data")]
        public string TextBox1Text
        {
            get { return textBox1.Text; }
            set { textBox1.Text = value; }
        }
        [Bindable(true), Category(""), Description("")]
        public Font TextBox1Font
        {
            get
            {
                return this.textBox1.Font;
            }
            set
            {              
                this.textBox1.Font = value;              
            }
        }

        private void textBox1_Resize(object sender, EventArgs e)
        {
            defaultTextBoxHeight = textBox1.Height;
            defaultTextBoxWidth = textBox1.Width;
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AutAppCenter
{
    public partial class BCTextBox : UserControl
    {
        private const int EM_SETCUEBANNER = 0x1501;
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        private static extern Int32 SendMessage(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)]string lParam);

        public Label BLable;
        private Panel BPanel;
        private TextBox BTextBox;
        private int requestedHeight;
        private string _Placeholder = "";
        public BCTextBox()
        {
            InitializeComponent();
            requestedHeight = BTextBox.Height;
            //SendMessage(BTextBox.Handle, EM_SETCUEBANNER, 0, _Placeholder);
        }

        private void InitializeComponent()
        {
            this.BLable = new System.Windows.Forms.Label();
            this.BTextBox = new System.Windows.Forms.TextBox();
            this.BPanel = new System.Windows.Forms.Panel();
            this.SuspendLayout();
            // 
            // BLable
            // 
            this.BLable.AutoSize = true;
            this.BLable.Font = new System.Drawing.Font("Verdana", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.BLable.Location = new System.Drawing.Point(2, 3);
            this.BLable.Name = "BLable";
            this.BLable.Size = new System.Drawing.Size(37, 14);
            this.BLable.TabIndex = 0;
            this.BLable.Text = "label";
            // 
            // BTextBox
            // 
            this.BTextBox.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.BTextBox.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.BTextBox.Location = new System.Drawing.Point(5, 24);
            this.BTextBox.Name = "BTextBox";
            this.BTextBox.Size = new System.Drawing.Size(144, 16);
            this.BTextBox.TabIndex = 1;
            this.BTextBox.MouseLeave += new System.EventHandler(this.BTextBox_MouseLeave);
            // 
            // BPanel
            // 
            this.BPanel.BackColor = System.Drawing.Color.DarkOrange;
            this.BPanel.Dock = System.Windows.Forms.DockStyle.Bottom;
            this.BPanel.Location = new System.Drawing.Point(0, 43);
            this.BPanel.Name = "BPanel";
            this.BPanel.Size = new System.Drawing.Size(152, 1);
            this.BPanel.TabIndex = 2;
            // 
            // BCTextBox
            // 
            this.BackColor = System.Drawing.Color.White;
            this.Controls.Add(this.BPanel);
            this.Controls.Add(this.BTextBox);
            this.Controls.Add(this.BLable);
            this.Name = "BCTextBox";
            this.Size = new System.Drawing.Size(152, 44);
            this.ResumeLayout(false);
            this.PerformLayout();

        }
        protected override void SetBoundsCore(
        int x, int y, int width, int height, BoundsSpecified specified)
        {
            int getHeight = BTextBox.Height + BLable.Height + 10;
            base.SetBoundsCore(x, y, width, getHeight, specified);
        }
        protected override void OnFontChanged(EventArgs e)
        {
            // 
            BTextBox.Font = this.Font;
        }
        protected override void OnForeColorChanged(EventArgs e)
        {
            //base.OnForeColorChanged(e);
            BTextBox.ForeColor = this.ForeColor;
        }
        [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
        public override string Text
        {
            get { return BTextBox.Text; }
            set {
                BTextBox.Text = value;               
            }
        }  

        [Description("Sets the Angle"),
        Category("Appearance"),
        DefaultValue(""),
        Browsable(true)]
        public string Placeholder
        {
            get { return _Placeholder; }
            set
            {
                _Placeholder = value;
                SendMessage(BTextBox.Handle, EM_SETCUEBANNER, 0, _Placeholder);
            }
        }
        [Description("Sets the Angle"),
        Category("Appearance"),
        DefaultValue(""),
        Browsable(true)]
        public string LableText
        {
            get { return BLable.Text; }
            set
            {
                BLable.Text = value;                
            }
        }

        private void BTextBox_MouseLeave(object sender, EventArgs e)
        {
            if (BTextBox.Text != string.Empty || BTextBox.Text != "")
            {
                BLable.Visible = true;
            }
            else
            {
                BLable.Visible = false;
            }
        }
        //[TypeConverter("System.Windows.Forms.Design.DataSourceConverter, System.Design")]
        //[Editor("System.Windows.Forms.Design.DataSourceListEditor, System.Design", typeof(UITypeEditor))]
    }
}