# Apply Brand Logo with projectId

Use the [brand logo recipe](/quick-start/explainer-videos/brand-with-project-id.md) in C#. `projectId` pulls your saved brand package (logos) into the generated video and thumbnail. Need a project first? Follow [Create a Project (Brand Assets)](/quick-start/tools/create-project.md) to save a logo via `imageUrl` or `imageData`.

```csharp
// Requires .NET 7+ for raw string literals.
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;

var token = Environment.GetEnvironmentVariable("AUTOCONTENT_TOKEN") ?? "YOUR_API_TOKEN";
var endpoint = "https://api.autocontentapi.com/content/Create";

var payloadJson = """
{
  "outputType": "video",
  "projects": ["YOUR_PROJECT_ID"],
  "resources": [
    { "type": "text", "content": "Explain our new platform launch and highlight customer success data." }
  ],
  "text": "Keep this to 90 seconds with a product intro, key proof points, and a closing CTA.",
  "titlePrompt": "Short, benefit-led launch teaser"
}
""";

using var client = new HttpClient();
using var request = new HttpRequestMessage(HttpMethod.Post, endpoint)
{
    Content = new StringContent(payloadJson, Encoding.UTF8, "application/json")
};
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

var response = await client.SendAsync(request);
var body = await response.Content.ReadAsStringAsync();

if (!response.IsSuccessStatusCode)
{
    Console.Error.WriteLine("Request failed: " + (int)response.StatusCode + " " + response.ReasonPhrase);
    Console.Error.WriteLine(body);
    Environment.Exit(1);
}

Console.WriteLine("Request accepted:");
Console.WriteLine(body);
```

Set `YOUR_API_TOKEN` (or `AUTOCONTENT_TOKEN`) and `YOUR_PROJECT_ID` before running.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.autocontentapi.com/code-samples/explainer-videos/csharp/brand-with-project-id.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.