I have a object O which has four properties a, b, c and d, I have a list List<T>.
I need to find the match in List<T> which matches the values of a and b in Object O
The object O could have a match in List<T>, but not always.
Trying to do this in linq, or whichever is most effective from a performance point.
List<T> could have around 1000 records.