check box liost control in c#

Here is a sample code for your help

In this I created a Form named 'MyChildForm' that has CheckBoxListControl where user could select the multiple items on CheckBoxList

OnClicking 'OK' button, form gets closed and all the checked items are saved into a property named 'ListOfCheckedItems'

    public partial class MyChildForm : Form
    {
        private List _listOfCheckedItems;

        public List ListOfCheckedItems
        {
            get { return _listOfCheckedItems; }
            set { _listOfCheckedItems = value; }
        }

        public MyChildForm()
        {
            InitializeComponent();
        }

        private void Oct_2014_Load(object sender, EventArgs e)
        {
            _listOfCheckedItems = new List();
        }

        // Ok Button
        private void button1_Click(object sender, EventArgs e)
        {
            //One by one it will fetch the items from the checked Items of the Checkedlistbox.
            foreach (var item in checkedListBox1.CheckedItems)
            {
                //Add the retrieved item into the our List.
                _listOfCheckedItems.Add(item.ToString());
            }
            this.Close();
        }
    }

On some other form, I call the ChildForm and retrieves all the checked values into a List (list)

            MyChildForm oMyChildForm = new MyChildForm();
            oMyChildForm.ShowDialog();
            List list = oMyChildForm.ListOfCheckedItems;

Hop it might help you to solve your problem