bug on CheckListBox

The ischecked method always returns true ignoring when the item is not
checked
Here is an example

using System;
using System.Drawing;
using wx;

namespace Form1
{
	public class MyFrame : wx.Frame
	{

		public const int ID_CHECKEDLISTBOX1	= 1;
		public CheckListBox checkedListBox1;
		public const int ID_BUTTON1	= 2;
		public Button button1;

		public MyFrame(string title, Point pos, Size size) :
base(title, pos, size,wx.Window.wxCAPTION|wx.Window.wxCLIP_CHILDREN|
wx.Window.wxMAXIMIZE_BOX| wx.Window.wxSYSTEM_MENU |
wx.Window.wxCLOSE_BOX|wx.Window.wxMINIMIZE_BOX)
		{

			Panel panel;
			button1=new Button(this, ID_BUTTON1, "button1", new
Point(344, 200), new Size(88, 48));
			button1.Lower();
			string[] checkedListBox1Items = {"test",
"terwrtew",   "trert",     "trwertw",         "trewtrwrew"};
			checkedListBox1=new CheckListBox(this,
ID_CHECKEDLISTBOX1, new Point(216, 56), new Size(216, 94),
checkedListBox1Items);
			checkedListBox1.Lower();
			checkedListBox1.BackgroundColour=new
wx.Colour(System.Drawing.SystemColors.Window.R,System.Drawing.SystemColors.W
indow.G,System.Drawing.SystemColors.Window.B);
			this.BackgroundColour=new
wx.Colour(System.Drawing.SystemColors.Control.R,System.Drawing.SystemColors.
Control.G,System.Drawing.SystemColors.Control.B);

			// Bind	events
			EVT_BUTTON(ID_BUTTON1, new
EventListener(this.button1_Click_1));
		}



		private void button1_Click_1(object sender, wx.Event e)
		{
			for (int i=0;i<checkedListBox1.Count;i++)
	
wx.MessageDialog.MessageBox(checkedListBox1.GetString(i),checkedListBox1.IsC
hecked(i).ToString(),0);					

		}
	}


	// Define a	new	application	type, each program should
derive a class from App
	public class MyApp : wx.App
	{

		public override bool OnInit()
		{
			MyFrame frame = new MyFrame("Form1", new
Point(50,50), new Size(548,331));
			frame.Show(true);
			return true;
		}

		[STAThread]
		static void Main()
		{
			MyApp app = new MyApp();
			app.Run();
		}
	}
}




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