GUI Windows Form C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
public class SimpleCustomControl : System.Windows.Forms.Control {
    public SimpleCustomControl() {
        InitializeComponent();
    }
    private void SimpleCustomControl_Paint(object sender, PaintEventArgs e) {
        Graphics g = e.Graphics;
        g.FillRectangle(Brushes.Yellow, ClientRectangle);
        g.DrawString("Hello, world", Font, Brushes.Black, 0, 0);
    }
    private void InitializeComponent() {
        this.SuspendLayout();
        this.Paint += new System.Windows.Forms.PaintEventHandler(this.SimpleCustomControl_Paint);
        this.ResumeLayout(false);
    }
}
public class Form1 : Form {
    public Form1() {
        InitializeComponent();
    }
    private void InitializeComponent() {
        this.simpleCustomControl1 = new SimpleCustomControl();
        this.SuspendLayout();
        this.simpleCustomControl1.Location = new System.Drawing.Point(12, 12);
        this.simpleCustomControl1.Size = new System.Drawing.Size(178, 110);
        this.simpleCustomControl1.Text = "simpleCustomControl1";
        this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 268);
        this.Controls.Add(this.simpleCustomControl1);
        this.ResumeLayout(false);
    }
    private SimpleCustomControl simpleCustomControl1;
    [STAThread]
    static void Main() {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}