Hi @Tingyu Chiang ,
1.Error: The connection "{8B86A6FB-6F84-45AB-ADCC-8F692341FA4C}" is not found.
Please verify that a connection manager in the connection manager collection, Connections, has been created with that ID.
2.I also tried VS2019, with the newest Microsoft Oracle connector. The "Test Connection" in the connector manager is failed. It says - "There was an error trying to establish an Oracle connection with the database server."
Please check if you set the TNS service name, username, password successfully.
Best Regards,
Mona
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Hot issues in October--Users always get connection timeout problem when using multi subnet AG via listener. Especially after failover to another subnet.