# TraconContentFilteredException > Tracon documentation. Tracon is a .NET package family that adds a control > plane on Microsoft Agent Framework, published as NuGet packages that run > inside your own ASP.NET Core application. > > Page: https://tracon.dev/api/tracon.traconcontentfilteredexception/ > Summary: TraconContentFilteredException: Thrown when a model provider cuts the response short with its safety or content filter.
Namespace Tracon · Assembly Tracon.Abstractions.dll
Thrown when a model provider cuts the response short with its safety or content filter. ```csharp public sealed class TraconContentFilteredException : TraconException, ISerializable ```
Inheritance
object ← Exception ← TraconException ← TraconContentFilteredException
Implements
ISerializable
Inherited Members
TraconException.ErrorType, Exception.GetBaseException(), Exception.ToString(), Exception.GetType(), Exception.TargetSite, Exception.Message, Exception.Data, Exception.InnerException, Exception.HelpLink, Exception.Source, Exception.HResult, Exception.StackTrace, object.GetType(), object.ToString(), object.Equals(object?), object.Equals(object?, object?), object.ReferenceEquals(object?, object?), object.GetHashCode()
## Remarks A filtered response usually arrives **empty**. Treating that as "succeeded but empty" produces the hardest case to debug: the user sees a blank answer and the record holds no trace. Tracon records it as an explicit failure instead — `RunError.Type` becomes `content_filtered`. Detection lives in a shared `IChatClient` decorator inside `Tracon.Core`, not inside the provider packages, so every provider gets the same behaviour. ## Constructors ### TraconContentFilteredException\(\) Creates a new error. ```csharp public TraconContentFilteredException() ``` ### TraconContentFilteredException\(string\) Creates a new error. ```csharp public TraconContentFilteredException(string message) ``` #### Parameters `message` [string](https://learn.microsoft.com/dotnet/api/system.string) The error message. ### TraconContentFilteredException\(string, Exception\) Creates a new error. ```csharp public TraconContentFilteredException(string message, Exception innerException) ``` #### Parameters `message` [string](https://learn.microsoft.com/dotnet/api/system.string) The error message. `innerException` [Exception](https://learn.microsoft.com/dotnet/api/system.exception) The underlying error. ## Fields ### ContentFilteredErrorType The stable value written to [TraconException.ErrorType](/api/tracon.traconexception/#Tracon_TraconException_ErrorType). ```csharp public const string ContentFilteredErrorType = "content_filtered" ``` #### Field Value [string](https://learn.microsoft.com/dotnet/api/system.string) ## Properties ### ErrorType Gets the stable error type name written to the run record. ```csharp public override string ErrorType { get; } ``` #### Property Value [string](https://learn.microsoft.com/dotnet/api/system.string) #### Remarks Defaults to the full name of the exception type, so today's behaviour does not change. A derived type overrides this member when the record has to be machine readable — for example [TraconContentFilteredException](/api/tracon.traconcontentfilteredexception/) writes `content_filtered`. Reports and alert rules can rely on this stable name instead of an assembly name. The value is written to `RunError.Type` and **carries no secret**. ### FinishReason Gets the finish reason the provider reported. For example Anthropic `refusal` or Gemini `SAFETY`. **Carries no secret.** ```csharp public string? FinishReason { get; init; } ``` #### Property Value [string](https://learn.microsoft.com/dotnet/api/system.string)? ### ProviderName Gets the provider that filtered the response, or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) when unknown. ```csharp public string? ProviderName { get; init; } ``` #### Property Value [string](https://learn.microsoft.com/dotnet/api/system.string)?