whatsapp/card

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// Install the C# / .NET helper library from twilio.com/docs/csharp/install
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using System;
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using Twilio;
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using Twilio.Rest.Content.V1;
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     TwilioClient.Init(accountSid, authToken);
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    // define the whatsapp/card 
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    var whatsappCard = new WhatsappCard.Builder();
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    whatsappCard.WithBody("Congratulations, you have reached Elite status! Add code {{1}} for 10% off.");
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    whatsappCard.WithHeaderText("This is a {{1}} card");
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    whatsappCard.WithFooter("To unsubscribe, reply Stop");
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    var cardAction1 = new CardAction.Builder()
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        .WithType(CardActionType.Url)
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        .WithUrl("https://www.twilio.com")
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        .WithTitle("Order Online")
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        .Build();
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    var cardAction2 = new CardAction.Builder()
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        .WithType(CardActionType.PhoneNumber)
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        .WithPhone("+15551234567")
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        .WithTitle("Call Us")
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        .Build();
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    whatsappCard.WithActions(new List<CardAction>() { cardAction1, cardAction2 });
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    // define all the content types to be part of the template
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    var types = new Types.Builder();
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    types.WithWhatsappCard(whatsappCard.Build());
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    // build the create request object
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    var contentCreateRequest = new ContentCreateRequest.Builder();
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    contentCreateRequest.WithTypes(types.Build());
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    contentCreateRequest.WithLanguage("en");
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    contentCreateRequest.WithFriendlyName("owl_coupon_code");
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    contentCreateRequest.WithVariables(new Dictionary<string, string>() { {"1", "coupon_code"} });
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    // create the twilio template
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    var contentTemplate = await CreateAsync(contentCreateRequest.Build());
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    Console.WriteLine($"Created Twilio Content Template SID: {contentTemplate.Sid}");