# MailMergeFieldAdapter Class

> The abstract MailMergeFieldAdapter class is the base class of all special DocumentServer mail merge field adapters. It implements the necessary means to access field properties.

- **Product:** TX Text Control .NET for Windows Forms
- **Section:** Reference
- **Kind:** Class
- **Introduced:** 15.0
- **Namespace:** `TXTextControl.DocumentServer.Fields`
- **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
- **Inherits:** `TXTextControl.DocumentServer.Fields.FieldAdapter`
- **Derived:** `TXTextControl.DocumentServer.Fields.DateField`, `TXTextControl.DocumentServer.Fields.IfField`, `TXTextControl.DocumentServer.Fields.IncludeText`, `TXTextControl.DocumentServer.Fields.MergeField`, `TXTextControl.DocumentServer.Fields.NextField`, `TXTextControl.DocumentServer.Fields.NextIfField`
- **Path:** TX Text Control .NET for Windows Forms > Reference > TXTextControl.DocumentServer.Fields > MailMergeFieldAdapter Class
- **1186 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/llms-full.txt

---

### Description

The abstract MailMergeFieldAdapter class is the base class of all special DocumentServer mail merge field adapters. It implements the necessary means to access field properties.

### Syntax

```csharp
public abstract class MailMergeFieldAdapter : FieldAdapter
```

```vbnet
Public MustInherit Class MailMergeFieldAdapter
    Inherits FieldAdapter
```

### Examples

The following example includes the preserve formatting value from a Mail Merge Field Adapter object in application diagnostics. The created object is then available to the surrounding document workflow.

```csharp
Console.WriteLine($"Preserve Formatting: {mailMergeFieldAdapter.PreserveFormatting}");
Console.WriteLine("Mail Merge Field Adapter is ready for use.");
```

```vbnet
Console.WriteLine($"Preserve Formatting: {mailMergeFieldAdapter.PreserveFormatting}")
Console.WriteLine("Mail Merge Field Adapter is ready for use.")
```

---

## In This Section

- [MailMergeFieldAdapter Constructor](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/constructor/llms-full.txt): Initializes a new instance of the MailMergeFieldAdapter class.
- [MailMergeFieldAdapter.PreserveFormatting Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/preserveformatting-property/llms-full.txt): Specifies whether the field's formatting should be preserved.

---

## Nearby

- **Previous:** [IncludeText.TextFormat Property](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/includetext/textformat-property/llms-full.txt)
- **Next:** [MailMergeFieldAdapter Constructor](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol-documentserver-fields/mailmergefieldadapter/constructor/llms-full.txt)