public void SetSelectedValue (NSComboBox combobox, object value)
{
var DisplayMember = cbox.DisplayMember;
var ValueMember = cbox.ValueMember;
if (string.IsNullOrEmpty (DisplayMember))
{
combobox.SelectItem (cbox.Items.IndexOf (value));
return;
}
combobox.SelectItem (cbox.Items.IndexOf (value));
}