# GetExpressionBNFHash Method

## Overloads

| [GetExpressionBNFHash()](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetExpressionBNFHash.htm#Qlik_Engine_IApp_GetExpressionBNFHash) |  | Gets a string hash calculated from the current Backus-Naur Form (BNF) grammar of the Qlik chart expressions supported within a given App. |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetExpressionBNFHash.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IApp.GetExpressionBNFHash.htm)

## GetExpressionBNFHash()

Gets a string hash calculated from the current Backus-Naur Form (BNF) grammar of the Qlik chart expressions supported within a given App.

### Declaration

```

          string GetExpressionBNFHash()
    
  
```

### Returns

| Type | Description |
| --- | --- |
| System.String |  |