> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic.md).

# MarkupDiagnostic

Struct in [LineParser](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser.md)

Inherits from `System.ValueType`

## Summary

Represents a diagnostic message produced during markup parsing.

```csharp
public struct MarkupDiagnostic : IEquatable<MarkupDiagnostic>
```

## Constructors

| Name                                                                                                                                                                        | Description                                                                                                                                                 |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [MarkupDiagnostic(string,int)](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic..ctor.md) | Initialises a new instance of the [MarkupDiagnostic](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic.md) struct. |

## Methods

| Name                                                                                                                                                                       | Description |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------- |
| [Equals(object)](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.equals-1.md)           |             |
| [Equals(MarkupDiagnostic)](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.equals-2.md) |             |
| [GetHashCode()](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.gethashcode.md)         |             |

## Properties

| Name                                                                                                                                                     | Description                                                                                  |
| -------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| [Column](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.column.md)   | Gets the zero-based column index of the start of the range at which this diagnostic appears. |
| [Message](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.message.md) | Gets the text of the diagnostic.                                                             |

## TYPENAME\_UNKNOWN\_PLURAL

| Name                                                                                                                                                                                                                                                                                             | Description |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------- |
| [M:Yarn.Markup.LineParser.MarkupDiagnostic.op\_Equality(Yarn.Markup.LineParser.MarkupDiagnostic,Yarn.Markup.LineParser.MarkupDiagnostic)](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.op_equality.md)     |             |
| [M:Yarn.Markup.LineParser.MarkupDiagnostic.op\_Inequality(Yarn.Markup.LineParser.MarkupDiagnostic,Yarn.Markup.LineParser.MarkupDiagnostic)](/3.1/api/csharp/yarn.markup/yarn.markup.lineparser/yarn.markup.lineparser.markupdiagnostic/yarn.markup.lineparser.markupdiagnostic.op_inequality.md) |             |