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

# 文件

> 使用 C# SDK 上传文件、查看元数据并获取文件内容。

**方法**：`client.UploadFile()`、`client.ListFiles()`、`client.RetrieveFile()`、`client.RetrieveFileContent()`。

### 示例

```csharp theme={null}
var client = new Phaseo(apiKey: apiKey);

var uploaded = await client.UploadFile(new Dictionary<string, object>
{
    ["purpose"] = "batch",
    ["file"] = "data:application/json;base64,eyJ0ZXN0Ijp0cnVlfQ=="
});

var file = await client.RetrieveFile("file_123");
var content = await client.RetrieveFileContent("file_123");
```

<Note>
  `ListFiles()` 已接入 SDK，但使用共享网关密钥时，`GET /files` 当前会返回 `file_list_not_supported_with_shared_gateway_key`
  保存已上传文件的 ID，并直接获取文件。
</Note>


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