AI-generated summary
In ABP, the Unit of Work manages database connections and transactions. It is best practice to open database connections as late as possible and release them as early as possible. ABP provides a simple and effective model for managing connections and transactions. The Repository class is the main class for executing database operations. When entering a repository method, ABP opens a database connection and starts a transaction, ensuring safe use of the connection within the method. Transactions are committed and connections are released after the method ends, and if an exception is thrown, the transaction is rolled back. Repository methods are atomic units of work. If a repository method calls other repository methods, they share the same connection and transaction. The Unit of Work is implicitly effective for repositories and application service methods, but can also be explicitly used to control database connections and transactions.