一种未知大小的数组，包含具有可变数量的值/属性的项。

I'm using a datatable where for each row I want to store some 3 or 4 fields, the fields are of different types, best case number of fields is 3, and I want to note the row_index (of the row in the datatable) as I need it.I'm using a datatable where for each row I want