Configure the maximum number of seconds a connection can persist when connecting to Cloud SQL for MySQL by using the ADO.NET Connection object.
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// ConnectionLifeTime sets the lifetime of a pooled connection // (in seconds) that a connection lives before it is destroyed // and recreated. Connections that are returned to the pool are // destroyed if it's been more than the number of seconds // specified by ConnectionLifeTime since the connection was // created. The default value is zero (0) which means the // connection always returns to pool. connectionString.ConnectionLifeTime = 1800; // 30 minutes