C# Checkedlistbox if checked

What you need is the method GetItemCheckState.

Usage as follows:

if(checkedListBox1.GetItemCheckState(2) == CheckState.Checked)
{

}

You can use it in this way

if (checkedListBox1.CheckedItems.Contains("ItemWithIndex2"))
{
    MessageBox.Show("Test");
}

Try something like...

checkedListBox1.GetItemChecked(i)

foreach(int indexChecked in checkedListBox1.CheckedIndices) {
    // The indexChecked variable contains the index of the item.
    MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" +
                    checkedListBox1.GetItemCheckState(indexChecked).ToString() + ".");
}