using (var client = new HttpClient())
{
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);
 
    var requestBody = new
    {
        prompt = prompt,
        n = 1,
        size = "1024x1024" // En yüksek çözünürlük 1024x1024
    };
 
    var jsonContent = new StringContent(JObject.FromObject(requestBody).ToString(), Encoding.UTF8, "application/json");
 
    HttpResponseMessage response = await client.PostAsync("https://api.openai.com/v1/images/generations", jsonContent);
    response.EnsureSuccessStatusCode();
 
    string responseBody = await response.Content.ReadAsStringAsync();
    var responseJson = JObject.Parse(responseBody);
 
    string imageUrl = responseJson["data"][0]["url"].ToString();
    return imageUrl;
}