public void AddData_EmptyValues()
        {
            datalist.Columns.Clear();
            datalist.Columns.Add(new DatalistColumn("Test", null));

            datalist.AddData(row, new TestModel {
                Value = "Test", Date = DateTime.Now.Date, Count = 4
            });

            Assert.Equal(new String[] { null }, row.Values);
            Assert.Equal(new[] { "Test" }, row.Keys);
        }