---
title: "TiffExtraChannelCollection..::.IsReadOnly Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Codecs_TiffExtraChannelCollection_IsReadOnly.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# TiffExtraChannelCollection.IsReadOnly Property 
 
Gets a value indicating whether the collection is read-only.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public ReadOnly Property IsReadOnly As Boolean
```
 
```csharp
public bool IsReadOnly { get; }
```
 
### Property Value
 **true** if the collection is read-only; otherwise, **false**. The default is **false**.
 
## Remarks
 A collection that is read-only does not allow the addition, removal, or modification of extra channels after the collection is created.
   
## See Also

### Reference

- [TiffExtraChannelCollection Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_TiffExtraChannelCollection.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)