---
title: "FileCacheTimeoutException Class"
canonical: https://www.graphicsmill.com/docs/gmwc/T_Aurigma_GraphicsMill_AjaxControls_FileCacheTimeoutException.htm
archived: true
applies_to:
  - product: "Graphics Mill Web Controls"
---

**You’re viewing documentation for an outdated product.** Graphics Mill Web Controls is no longer part of Graphics Mill. For current design editing and rendering tools, see [Design Atoms .NET](https://customerscanvas.com/docs/on-premises/design-atoms-cs/), [Design Atoms JS](https://customerscanvas.com/docs/on-premises/design-atoms-js/), and [Design Editor](https://customerscanvas.com/docs/on-premises/design-editor/).

# FileCacheTimeoutException Class

**Applies to:** Graphics Mill Web Controls · **Archived documentation**
 
This exception is thrown when the control cannot get the cache index file until timeout expires.
 
**Namespace:** [Aurigma.GraphicsMill.AjaxControls](https://www.graphicsmill.com/docs/gmwc/N_Aurigma_GraphicsMill_AjaxControls.htm.md)
 **Assembly:** Aurigma.GraphicsMill.AjaxControls (in Aurigma.GraphicsMill.AjaxControls.dll)
 
## Syntax
  
```csharp
public class FileCacheTimeoutException : Exception, ISerializable
```
 
## Remarks
  
Cache index file is a special file which synchronizes access to the file cache. When a control acesses the file cache, it locks this file and unlocks when it stops using it. It prevents synchronization problems if the file cache is accessed by several threads simultaneously. In this case the second thread retries to lock the index file until timeout expires (10 seconds). If it happens, this exception is thrown.
 
## Inheritance Hierarchy
  
- [System..Object](http://msdn2.microsoft.com/en-us/library/e5kfa45b)
    - *+* [System..Exception](http://msdn2.microsoft.com/en-us/library/c18k6c59)
        - *+* Aurigma.GraphicsMill.AjaxControls..FileCacheTimeoutException
   
## See Also

### Reference

- [FileCacheTimeoutException Members](https://www.graphicsmill.com/docs/gmwc/AllMembers_T_Aurigma_GraphicsMill_AjaxControls_FileCacheTimeoutException.htm.md)
- [Aurigma.GraphicsMill.AjaxControls Namespace](https://www.graphicsmill.com/docs/gmwc/N_Aurigma_GraphicsMill_AjaxControls.htm.md)