public void Test_ExceptionClearListIsReadOnly()
{
var intList = new ListCollection <int> {
1, 2, 3, 4, 5
};
var readOnly = new ReadOnlyListCollection <int>(intList);
var checkGet = Assert.Throws <NotSupportedException>(() => readOnly.Clear());
Assert.Equal("List is readonly!", checkGet.Message);
}
