---
title: "Interface IUnsupportedGlyphService | Customer's Canvas On-Premises"
canonical: "https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers/IUnsupportedGlyphService/"
---

# Interface IUnsupportedGlyphService

> `System.Char`

###### **Namespace**: [Aurigma.DesignAtoms.Canvas.ItemHandlers](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers.md)

###### **Assembly**: Aurigma.DesignAtoms.dll

```csharp title="Syntax"
public interface IUnsupportedGlyphService
```

## Methods

### GetSymbolFromException

```csharp
char GetSymbolFromException(FontFallbackException exception)
```

##### Parameters

| Type | Name | Description |
|:---|:---|:---|
| `Aurigma.GraphicsMill.AdvancedDrawing.FontFallbackException` | *exception* |  |

##### Returns

### FindAllMissingGlyphs

```csharp
void FindAllMissingGlyphs(char symbol, string text, Action<string> checkFunction, FontRegistry fontRegistry = null)
```

##### Parameters

| Type | Name | Description |
|:---|:---|:---|
| `System.Char` | *symbol* |  |
| `System.String` | *text* |  |
| `System.Action<System.String>` | *checkFunction* |  |
| `Aurigma.GraphicsMill.AdvancedDrawing.FontRegistry` | *fontRegistry* |  |

### RemoveDiscardedSymbolsFromText

```csharp
string RemoveDiscardedSymbolsFromText(string text, FontRegistry fontRegistry = null)
```

##### Parameters

| Type | Name | Description |
|:---|:---|:---|
| `System.String` | *text* |  |
| `Aurigma.GraphicsMill.AdvancedDrawing.FontRegistry` | *fontRegistry* |  |

##### Returns

`System.String`