Hi,

I read a csv file to a datatable. I don't know what are the column types at
this moment, so I treat all columns as string type.

After I read data from file, I use dataTable.Select(condition) to select
some lines.

The problem is with numeric columns, since in datatable, it is string type,
it compares rows as string so make Select() return wrong set of rows.

I was trying to change DataColumn type, but it is an error since there are
already data in the column.

What is the best way to solve this problem? Any input is highly appreciated!

Ryan Liu