# Diagnostics

Property in [CompilationResult](/2.5/api/csharp/yarn.compiler/yarn.compiler.compilationresult.md)

## Summary

Gets the collection of [Diagnostic](/2.5/api/csharp/yarn.compiler/yarn.compiler.diagnostic.md) objects that describe problems in the source code.

```csharp
public IEnumerable<Diagnostic> Diagnostics { get; internal set; }
```

## Remarks

If the compiler encounters errors while compiling source code, the [CompilationResult](/2.5/api/csharp/yarn.compiler/yarn.compiler.compilationresult.md) it produces will have a [Program](/2.5/api/csharp/yarn.compiler/yarn.compiler.compilationresult/yarn.compiler.compilationresult.program.md) value of `null` . To help figure out what the error is, users should consult the contents of this property.


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