>>>Hi everybody,
>>>
>>>I am getting this error
>>>
>>>"Object cannot be cast from DBNull to other types"
>>>
>>>on this piece of code:
>>>

>>>start_time = Convert.ToDateTime((row["start_time"] ?? DTSqlMinDate));

>>>
>>>As you see here, I attempt to use C# coalesce operator in order to avoid this error, but it doesn't work. How should I correct this error without introducing extra nullable datetime variable?
>>>
>>>Thanks in advance.
>>>
>>>UPDATE. This seems to fix the problem
>>>

>>>Convert.ToDateTime((row["start_time"]== DBNull.Value)?DTSqlMinDate:row["start_time"]);

>>
>>I think you were confusing DBNull with C# null which is what the ?? operator uses.......
>
>I thought the above would prevent the problem. Is there any other way to fix it besides my solution?

Depending on the actual type stored in the column, you could try

start_time = row.Field<DateTime?>("start_time") ?? DTSqlMinDate;

It won't work if you have a string you need converted to a DateTime though.