Explain Connection Resiliency and Execution Strategies in EF Core.

Connection resiliency handles transient database connection failures by automatically retrying failed commands.

In cloud environments (like Azure SQL), connections can drop momentarily. EF Core provides an Execution Strategy (like EnableRetryOnFailure) that automatically retries transactions. When using custom execution strategies, explicit transactions require manual invocation of the execution strategy's Execute() method to ensure the entire transaction block is retried.