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docs/snippets/csharp/cloud_ocr_backend.md

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+```csharp title="C#"
+using Kreuzberg;
+using System.Net.Http;
+using System.Text.Json;
+
+public class CloudOcrBackend : IOcrBackend
+{
+    private readonly string _apiKey;
+    private readonly List<string> _langs = new() { "eng", "deu", "fra" };
+
+    public CloudOcrBackend(string apiKey)
+    {
+        _apiKey = apiKey;
+    }
+
+    public string Name() => "cloud-ocr";
+    public string Version() => "1.0.0";
+    public List<string> SupportedLanguages() => _langs;
+
+    public Dictionary<string, object> ProcessImage(byte[] imageBytes, Dictionary<string, object> config)
+    {
+        using (var client = new HttpClient())
+        {
+            using (var form = new MultipartFormDataContent())
+            {
+                form.Add(new ByteArrayContent(imageBytes), "image");
+                var lang = config.ContainsKey("language") ? config["language"].ToString() : "eng";
+                form.Add(new StringContent(lang), "language");
+
+                var response = client.PostAsync("https://api.example.com/ocr", form).Result;
+                var json = response.Content.ReadAsStringAsync().Result;
+                var doc = JsonDocument.Parse(json);
+                var text = doc.RootElement.GetProperty("text").GetString();
+
+                return new Dictionary<string, object>
+                {
+                    { "content", text },
+                    { "mime_type", "text/plain" }
+                };
+            }
+        }
+    }
+
+    public void Initialize() { }
+    public void Shutdown() { }
+}
+
+class Program
+{
+    static void Main()
+    {
+        var backend = new CloudOcrBackend(apiKey: "your-api-key");
+        KreuzbergLib.RegisterOcrBackend(backend);
+    }
+}
+```