C# - Inserting multiple rows using a stored procedure

Question

I have a list of objects, this list contains about 4 million objects. there is a stored proc that takes objects attributes as params , make some lookups and insert them into tab

Answer 1

Take a look at the SqlBulkCopy Class

based on your comment, dump the data into a staging table then do the lookup and insert into the real table set based from a proc....it will be much faster than row by row