The Item property of the Rows collection returns an Object datatype by default. You have to cast this value into the datatype you need (from Object to Single in your case).

>Hello All,
>
>I have a dataset with a table. I want to perform a calculation on the column age which is a single. So I thought simple, just do something like this :
>

> Single  age =(MyTable.Rows[0]["age"]);
>

>
>Doing this I get an error : cannot implicitly convert type object to float. I checked the type of MyTable.Rows[0]["age"].GetType() and gives System.Single.
>
>My question why do I have to convert it? The type is right? I don't understand, could someone shed some light on it?
>
>Thank you.