public void FormData_EmptyValues()
{
datalist.Columns.Clear();
datalist.Columns.Add(new DatalistColumn("Test", null));
Dictionary <String, String> row = datalist.FormData(new TestModel {
Id = "1", Value = "Test", Date = DateTime.Now.Date, Count = 4
});
Assert.Equal(new[] { "Id", "Label", "Test" }, row.Keys);
Assert.Equal(new[] { "1", null, null }, row.Values);
}