C# dynamically convert resources bitmap image to windows application icon

namespace : using System.Windows.Forms

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

namespace FormDynamicIChangeIcon
{
    public partial class Form1 : Form
    {  
        public Form1()
        {
            InitializeComponent();
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            Bitmap targetBmp;
            IntPtr Hicon = new IntPtr();
            Icon FrmIcon;

            if (comboBox1.Text == "green")
            {
                targetBmp = global::FormDynamicIChangeIcon.Properties.Resources.green;
                Hicon = targetBmp.GetHicon();//Returns handle to an icon with the same image as the System.Drawing.Bitmap.
                FrmIcon = Icon.FromHandle(Hicon);
                this.Icon = FrmIcon;
            }  
            else   if (comboBox1.Text == "red")
            {
                targetBmp = global::FormDynamicIChangeIcon.Properties.Resources.red;
                Hicon = targetBmp.GetHicon();
                FrmIcon = Icon.FromHandle(Hicon);
                this.Icon = FrmIcon;
            }
            else
            {
                targetBmp = global::FormDynamicIChangeIcon.Properties.Resources.yellow;
                Hicon = targetBmp.GetHicon();
                FrmIcon = Icon.FromHandle(Hicon);
                this.Icon = FrmIcon;
            }
        }
    }
}