compare datatable data

Hi,
I have two datatables.
dtToBeChecked and dtCriteria
dtCriteria is a set of records which have criteria for each field in dtToBeChecked.
The records inside dtToBeChecked need to be checked against dtCriteria to see if the data match. (Trying to make sure that the data in dtToBeChecked are all valid and match the criteria in dtCriteria and if one of the values in dtToBeChecked does not match what is in the dtCriteria then return false).
For example, the fields in dtToBeChecked are all present in dtCriteria. And the values in dtToBeChecked will be checked against the values for the entered fields in dtCriteria.

I have decided to:
1- loop through the rows in dtToBeChecked
2- get the fieldname and cell value
3- loop through the rows in dtCriteria and see if there is a match.
4 return false if there is no match.

Is what I am trying to do correct?

Thanks