Explain the differences between optimistic and pessimistic

concurrency in ADO.NET.

• Optimistic Concurrency: Assumes that data conflicts are rare. It allows multiple

users to read and modify the data without locking the record. However, when

updating, it checks if the data has been modified by another user since it was last

read.

• Pessimistic Concurrency: Locks the data when it's being read or modified,

preventing other users from accessing it until the transaction is complete. It can

reduce conflicts but may result in performance issues.