AzCommerceDemo-ServiceBusTopicsCLI-ModifySubscription.cs

static async Task ModifySubscriptionWithInStockFilter() {
    var subscriptionClient = new SubscriptionClient(
        SERVICEBUSCONNSTRING,
        TOPICNAME,
        SUBNAME,
        ReceiveMode.ReceiveAndDelete);

    await subscriptionClient.AddRuleAsync(new RuleDescription
    {
        Filter = new SqlFilter("IsInStock = true"),
        Name = "OnlyBackInStock"
    });

    Console.WriteLine("Subscription modified with new filter");
}