c# excel

Question

i  have to load  two  excel  sheet  in  two diff   data table  .i use linq query compare two data  table .row comparer method. it work  fine.

 

how  to find out which column is diff in second datatable.  query  is

var userDataSecondSet = userData2.AsEnumerable().Except(userData1.AsEnumerable(), DataRowComparer.Default);

 

the above qury work fine.but how can i find out which column diff in row. pls send the answer