# Diagnostic(string,Range,string,DiagnosticSeverity)

Constructor in [Diagnostic](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.compiler/yarn.compiler.diagnostic)

## Summary

Initializes a new instance of the [Diagnostic](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.compiler/yarn.compiler.diagnostic) class.

```csharp
public Diagnostic(string fileName, Range range, 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.                                                                                                                                          |
| [Yarn.Compiler.Range](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.compiler/yarn.compiler.range) range                                                                             | Gets or sets the range of the file indicated by [FileName](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.compiler/yarn.compiler.diagnostic/yarn.compiler.diagnostic.filename) that the issue occurred in. |
| `string` message                                                                                                                                                                       | Gets or sets the description of the issue.                                                                                                                                                                   |
| [Yarn.Compiler.Diagnostic.DiagnosticSeverity](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.compiler/yarn.compiler.diagnostic/yarn.compiler.diagnostic.diagnosticseverity) severity | Gets or sets the severity of the issue.                                                                                                                                                                      |