## Detect(Stream, string) {#detect}

Detect the file format from data stream, file name is optional for guessing types that has no magic header.

```csharp
public static FileFormat Detect(Stream stream, string fileName)
```

| Parameter | Type | Description |
| --- | --- | --- |
| stream | Stream | Stream containing data to detect |
| fileName | String | Original file name of the data, used as hint. |

### Return Value

The [`FileFormat`](../) instance of the detected type or null if failed.

### Exceptions

| exception | condition |
| --- | --- |
| IOException | Exception thrown when failed to read data. |

## Examples

```csharp
byte[] bytes = new byte[100];//take the bytes from your source
var fmt = FileFormat.Detect(new MemoryStream(bytes), "input-file");
Console.WriteLine($"Input data format: {fmt}");
```

### See Also

* class [FileFormat](../)
* namespace [Aspose.ThreeD](../../fileformat/)
* assembly [Aspose.3D](../../../)

---

## Detect(string) {#detect_1}

Detect the file format from file name, file must be readable so Aspose.3D can detect the file format through file header.

```csharp
public static FileFormat Detect(string fileName)
```

| Parameter | Type | Description |
| --- | --- | --- |
| fileName | String | Path to the file to detect file format. |

### Return Value

The [`FileFormat`](../) instance of the detected type or null if failed.

### Exceptions

| exception | condition |
| --- | --- |
| IOException | Exception thrown when failed to read data. |

## Examples

```csharp
var fmt = FileFormat.Detect("input.fbx");
Console.WriteLine($"Input file format: {fmt}");
```

### See Also

* class [FileFormat](../)
* namespace [Aspose.ThreeD](../../fileformat/)
* assembly [Aspose.3D](../../../)