# InputFormat.Underline Property

> Gets or sets a value specifying whether text is underlined at the current input position. The underlining style is determined through the UnderlineStyle property. If text is selected, the property specifies this attribute for the whole selected text.

- **Product:** TX Text Control .NET for WPF
- **Section:** Reference
- **Kind:** Property
- **Introduced:** 16.0
- **Namespace:** `TXTextControl`
- **Package:** `TXTextControl.TextControl.WPF.SDK` (assembly `TXTextControl.dll`, from the private NuGet feed or Text Control Offline Packages)
- **.NET Framework:** reference `TXTextControl.dll` from the setup
- **Path:** TX Text Control .NET for WPF > Reference > TXTextControl > InputFormat.Underline Property
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/llms-full.txt

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## On This Page

- [Description](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/#description)
- [Syntax](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/#syntax)
- [Examples](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/#examples)
- [Remarks](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underline-property/#remarks)

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## Nearby

- **Previous:** [InputFormat.TopFrameLine Property](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/topframeline-property/llms.txt)
- **Next:** [InputFormat.UnderlineStyle Property](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol/inputformat/underlinestyle-property/llms.txt)