Two DataTables-Comparisions

Need a quick help!! Please guide me through this…!
I have two data tables namely DT1 and DT2.
DT1 has column name ID, Date,Invoicenumber besides other columns as well.(input data)
DT2 has column name JobId,Invoicedate,Document no: besides other columns as well.(Comparing data)
Example: ID and Job ID is same, then i want the other two columns should also match for that particluar ID or else state “not match”. That means all the 3 columns in the input data should get match with the values in the comparing data for each particular ID.