How to totally lock a row in Entity Framework

Question

I am working with a situation where we are dealing with money transactions.

For example, I have a table of users wallets, with their balance in that row.

Answer 1

you can set the isolationlevel on the transaction in Entity framework to ensure no one else can change it:

YourDataContext.Database.BeginTransaction(IsolationLevel.RepeatableRead)

RepeatableRead Summary: Locks are placed on all data that is used in a query, preventing other users from updating the data. Prevents non-repeatable reads but phantom rows are still possible.