Conversion for empty items..?

[yltsa]

Hi,

I have database where the values are saved as varchar(xx) and like to convert those to values based on UnitsNet.

The problem is, that sometimes the fields are empty in the database. Is it possible to make converters which returns nullable values like "Speed?" ? Later it would be easy to make a query and check the HasValue property and skip the empty rows.

Now my software crashes because the conversions fail.

BR, Ilkka