Odd or misleading handling of empty values in BulkInsert

[OssiGalkin]

In BulkInsert if the parameter "Convert Empty PropertyValues To Null" is true

Frends.Sql/Frends.Sql/Sql.cs

Line 239 in 83d118c

if (options.ConvertEmptyPropertyValuesToNull)

the Task will set whole row to null instead of the individual cell

Frends.Sql/Frends.Sql/Extensions.cs

Line 49 in 83d118c

row[index] = null;

but that's what the actual method name implies though. But it does that when any of the cells are empty.

Why it sets whole row to null (why not element)?

[OssiGalkin]

Also shouldn't DbNull be use instead of null?