try this
private void SetSelected(string selected)
{
CheckBox[] myCheckBoxes = { checkBox1, checkBox2, checkBox3, checkBox4, checkBox5, checkBox6, checkBox7, checkBox8, checkBox9, checkBox10 };
string[] selectedItems = selected.Split('/');
myCheckBoxes.ToList().ForEach(k =>
{
k.Checked = false;
if (selectedItems.Contains(k.Text))
k.Checked = true;
});
}
private string GetSelected()
{
CheckBox[] myCheckBoxes = { checkBox1, checkBox2, checkBox3, checkBox4, checkBox5, checkBox6, checkBox7, checkBox8, checkBox9, checkBox10 };
string selected = "";
myCheckBoxes.ToList().ForEach(k =>
{
if (k.Checked)
selected += k.Text + "/";
});
return selected.TrimEnd('/');
}