How will you obtain the length of the longest string in every column of a Datatable assuming that every column in of type string using Lambda?

DataTable dt = new DataTable();



  var maximumColumnsLengths =

                        Enumerable.Range(0, dt.Columns.Count)

                        .Select(col => dt.AsEnumerable()

                        .Select(row => row[col]).OfType<string>()

                        .Max(val => val.Length)).ToList();