# TraconContentBlockedException > 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.traconcontentblockedexception/ > Summary: TraconContentBlockedException: Thrown when an IContentGuard blocks content.
Namespace Tracon · Assembly Tracon.Abstractions.dll
Thrown when an [IContentGuard](/api/tracon.icontentguard/) blocks content. ```csharp public sealed class TraconContentBlockedException : TraconException, ISerializable ```
Inheritance
object ← Exception ← TraconException ← TraconContentBlockedException
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 This is separate from [TraconContentFilteredException](/api/tracon.traconcontentfilteredexception/) and must stay separate: that one reports that the *provider* cut the response, this one reports that Tracon's own policy did not let the content through. Writing both to the same stable identity would cost the operator the difference between "the model refused" and "we refused". Neither the message nor the fields **carry the blocked content**. The message can reach the client in a `422` body; putting sensitive text there would spread the problem. ## Constructors ### TraconContentBlockedException\(\) Creates a new error. ```csharp public TraconContentBlockedException() ``` ### TraconContentBlockedException\(string\) Creates a new error. ```csharp public TraconContentBlockedException(string message) ``` #### Parameters `message` [string](https://learn.microsoft.com/dotnet/api/system.string) The error message. MUST not carry the blocked text. ### TraconContentBlockedException\(string, Exception\) Creates a new error. ```csharp public TraconContentBlockedException(string message, Exception innerException) ``` #### Parameters `message` [string](https://learn.microsoft.com/dotnet/api/system.string) The error message. MUST not carry the blocked text. `innerException` [Exception](https://learn.microsoft.com/dotnet/api/system.exception) The underlying error. ## Fields ### ContentBlockedErrorType The stable value written to [TraconException.ErrorType](/api/tracon.traconexception/#Tracon_TraconException_ErrorType). ```csharp public const string ContentBlockedErrorType = "content_blocked" ``` #### Field Value [string](https://learn.microsoft.com/dotnet/api/system.string) ## Properties ### Direction Gets the direction that was inspected. ```csharp public ContentGuardDirection Direction { get; init; } ``` #### Property Value [ContentGuardDirection](/api/tracon.contentguarddirection/) ### 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**. ### GuardName Gets the name of the guard that made the decision. ```csharp public string? GuardName { get; init; } ``` #### Property Value [string](https://learn.microsoft.com/dotnet/api/system.string)? ### RuleName Gets the matched rule name, or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) when the guard reports none. ```csharp public string? RuleName { get; init; } ``` #### Property Value [string](https://learn.microsoft.com/dotnet/api/system.string)?