How to read a row iin a datatable

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C#7.0

Hi I wish to read in a function the values of a row with the following code

DataRow TrimChamps(DataRow row)
        {
            foreach (DataRow.columns col in row)
            {
            }
            return row;
        }

But DataRow don't have the columns property.
How to solve it without having to pass to the function the whole DataTable as a parameter?
Thanks
Bernard

What I have tried:

DataRow TrimChamps(DataRow row)
        {
            foreach (DataRow.columns col in row)
            {
            }
            return row;
        }