listview with 3 checkboxs in each row

Hello, i am new to Android and i try to build a list view with multiple checkboxs in. It seems to work but it's not working. When i click a checkbox i have the good event on the good position the first time. the second time, it raises two events for only one click with a good position and a bad one. After, it raises 4, 8 , ...events abd not only one. This is the view code :

public override View GetView(int position, View convertView, ViewGroup parent) { var item = items[position];

        View view = convertView;
        if (view == null) // no view to re-use, create new
        {
            view = context.LayoutInflater.Inflate(Resource.Layout.LayRowTestListView, null);
        }

        TextView myString1 = view.FindViewById<TextView>(Resource.Id.TEST_String1);
        myString1.Text = item.myString1;

        TextView myString2 = view.FindViewById<TextView>(Resource.Id.TEST_String2);
        myString2.Text = item.myString2;

        CheckBox myCheckBoxA = view.FindViewById<CheckBox>(Resource.Id.TESTCheckBoxA);

        myCheckBoxA.Checked = item.myCheckBoxA.Checked;

        //here, the  event which works good for the first click, had 2 events for one click the second time, and multiple events after..

// with bad poistions after the first clcik

        myCheckBoxA.CheckedChange += (sender, e) =>
        {


            Toast.MakeText(context, "position = " + position.ToString() + "string1 = " + myString1, ToastLength.Short).Show();

            item.myCheckBoxA.Checked = !item.myCheckBoxA.Checked;
        };


        CheckBox myCheckBoxB = view.FindViewById<CheckBox>(Resource.Id.TESTCheckBoxB);

        myCheckBoxB.Checked = item.myCheckBoxB.Checked;

        CheckBox myCheckBoxC = view.FindViewById<CheckBox>(Resource.Id.TESTCheckBoxC);

        myCheckBoxC.Checked = item.myCheckBoxC.Checked;



        return view;
    }

I saw no sample with objects like multiple checkbox or buttons or spinner... in a custom listview with events. Any idear ? Thanks