# DataSourceManager.IsMergeBlock Method

> Checks if a given SubTextPart is a merge block.

- **Product:** TX Text Control .NET for Windows Forms
- **Section:** Reference
- **Kind:** Method
- **Introduced:** 24.0
- **Namespace:** `TXTextControl.DocumentServer.DataSources`
- **Package:** `TXTextControl.TextControl.WinForms.SDK` (assembly `TXDocumentServer.dll`, from the private NuGet feed or Text Control Offline Packages)
- **.NET Framework:** reference `TXDocumentServer.dll` from the setup
- **Path:** TX Text Control .NET for Windows Forms > Reference > TXTextControl.DocumentServer.DataSources > DataSourceManager.IsMergeBlock Method
- **459 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datasources/datasourcemanager/ismergeblock-method/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datasources/datasourcemanager/ismergeblock-method/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datasources/datasourcemanager/ismergeblock-method/llms-full.txt

---

### Description

Checks if a given SubTextPart is a merge block.

### Syntax

```csharp
public static bool IsMergeBlock(SubTextPart subTextPart);
```

```vbnet
Public Shared Function IsMergeBlock(subTextPart As SubTextPart) As Boolean
```

### Parameters

| Parameter | Description |
|---|---|
| subTextPart | The SubTextPart object to be checked. |

### Examples

The following example checks whether merge block applies to the data source manager.

```csharp
if (TXTextControl.DocumentServer.DataSources.DataSourceManager.IsMergeBlock(new SubTextPart("CustomerName", 100)))
{
    Console.WriteLine("Is Merge Block completed successfully.");
}
```

```vbnet
If TXTextControl.DocumentServer.DataSources.DataSourceManager.IsMergeBlock(New SubTextPart("CustomerName", 100)) Then
    Console.WriteLine("Is Merge Block completed successfully.")
End If
```

---

## Nearby

- **Previous:** [DataSourceManager.InsertMergeBlock Method](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datasources/datasourcemanager/insertmergeblock-method/llms-full.txt)
- **Next:** [DataSourceManager.IsMergingPossible Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-datasources/datasourcemanager/ismergingpossible-property/llms-full.txt)