> ## Documentation Index
> Fetch the complete documentation index at: https://docs.karflows.com/llms.txt
> Use this file to discover all available pages before exploring further.

# C#

> Use KarFlows APIs from .NET.

## Unified message

```csharp theme={null}
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;

var baseUrl = "https://your-karflows-domain.com";
var token = Environment.GetEnvironmentVariable("KARFLOWS_UNIFIED_TOKEN");

using var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);

var payload = new
{
    to = "+255700000000",
    text = "Your booking is confirmed.",
    channels = new[] { "whatsapp_qr", "sms" },
    deliveryMode = "fallback",
    whatsappFrom = "447405993704",
    sender = "APPROVED"
};

var response = await client.PostAsync(
    $"{baseUrl}/api/omni/send",
    new StringContent(JsonSerializer.Serialize(payload), Encoding.UTF8, "application/json")
);

var body = await response.Content.ReadAsStringAsync();
Console.WriteLine(body);
```