Unmatched records using LINQ

[ppr (Peter Preuss)]

then you have to switch to:
dt2 except commonrows
Find demo here,
hasib08_II_0.3.xaml (11.0 KB)
take care about the renamed variables, do not copy paste blindly

EDIT: 0.3 Version is returning dt2 rows from Common rows check, should be more safe at your end