---
title: "TiffExtraChannelEntry Class"
canonical: https://www.graphicsmill.com/docs/gm/T_Aurigma_GraphicsMill_Codecs_TiffExtraChannelEntry.htm
product: "Graphics Mill"
---

# TiffExtraChannelEntry Class
 
Represents the TIFF extra channel to embed into an image.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```csharp
public sealed class TiffExtraChannelEntry
```
 
## Examples
  
The following code adds a JPEG image to a TIFF image as an unassociated alpha extra channel, and saves the resulting TIFF image.
 
```csharp
using (var reader = new TiffReader(@"Images\BusinessCard.tif"))
using (var writer = new TiffWriter(@"Images\Output\result.tif"))
{
    // Load bitmap for the extra channel.
    // Note: image for extra channel must be gray scale and have the same dimensions and DPI as the source one. 
    using (var extraBitmap = new Bitmap(@"Images\extraChannel.jpg"))
    {
        // Create extra channel options based on extraBitmap.
        var extraChannel = new TiffExtraChannelEntry(extraBitmap, TiffChannelType.Alpha);

        writer.ExtraChannels.Add(extraChannel);
        Pipeline.Run(reader + writer);
    }
}
```
 
## Inheritance Hierarchy
  
- System.Object
    - Aurigma.GraphicsMill.Codecs.TiffExtraChannelEntry
 
## Thread Safety
 Static members of this type are not safe for multi-threaded operations. Instance members of this type are not safe for multi-threaded operations.
   
## See Also

### Reference

- [TiffExtraChannelEntry Members](https://www.graphicsmill.com/docs/gm/AllMembers_T_Aurigma_GraphicsMill_Codecs_TiffExtraChannelEntry.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Codecs.htm.md)
- [Aurigma.GraphicsMill.Codecs.TiffExtraChannelCollection](https://www.graphicsmill.com/docs/gm/T_Aurigma_GraphicsMill_Codecs_TiffExtraChannelCollection.htm.md)

### Manual

- [Supported File Formats](https://www.graphicsmill.com/docs/gm/supported-file-formats.htm.md)
- [Working with TIFF Extra Channels](https://www.graphicsmill.com/docs/gm/working-with-tiff-extra-channels.htm.md)