Question: what is the difference between add and addrange in c#?
Answer: Add---------It is used to add the item into the list one by one. AddRange-----------It is used to add the bulk of list item into the another list. ... But if you want to add List or multiple variable in List, then AddRange() can be used var t = (from t1 intable1 join t2 in table2 on t1.