# Diagnostic(string,string,DiagnosticSeverity)

Constructor in [Diagnostic](https://docs.yarnspinner.dev/api/csharp/yarn.compiler/yarn.compiler.diagnostic)

## Summary

Initializes a new instance of the [Diagnostic](https://docs.yarnspinner.dev/api/csharp/yarn.compiler/yarn.compiler.diagnostic) class.

```csharp
public Diagnostic(string fileName, string message, DiagnosticSeverity severity = DiagnosticSeverity.Error)
```

## Parameters

| Name                                                                                                                                                                               | Description                                                         |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
| `string` fileName                                                                                                                                                                  | Gets or sets the path, URI or file-name that the issue occurred in. |
| `string` message                                                                                                                                                                   | Gets or sets the description of the issue.                          |
| [Yarn.Compiler.Diagnostic.DiagnosticSeverity](https://docs.yarnspinner.dev/api/csharp/yarn.compiler/yarn.compiler.diagnostic/yarn.compiler.diagnostic.diagnosticseverity) severity | Gets or sets the severity of the issue.                             |