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Different transaction isolation levels in WCF.Read Uncommitted: Also known as Dirty isolation level. It makes sure that corrupt Data cannot be read. This is the lowest isolation level.
Read Committed: It ensures not to read the data that has been changed by any other application and is not yet committed. It is the default level.
Repeatable Read: It stops the usage of dirt read and non-repeatable read. It states that data fetched through a query will be locked and will not be updated by any other transaction.
Serializable: It does not allow any modification and addition of new data till the transaction is completed. This is considered to be a very restrictive level.
Snapshot: It raises error on modifying a data that has already been changed by any transaction.
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