# CannotSampleRequiresInferenceException Namespace: LLama.Batched This exception is thrown when "Sample()" is called on a [Conversation](./llama.batched.conversation.md) which has already been prompted and before "Infer()" has been called on the associated [BatchedExecutor](./llama.batched.batchedexecutor.md). ```csharp public class CannotSampleRequiresInferenceException : ExperimentalBatchedExecutorException, System.Runtime.Serialization.ISerializable ``` Inheritance [Object](https://docs.microsoft.com/en-us/dotnet/api/system.object) → [Exception](https://docs.microsoft.com/en-us/dotnet/api/system.exception) → [ExperimentalBatchedExecutorException](./llama.batched.experimentalbatchedexecutorexception.md) → [CannotSampleRequiresInferenceException](./llama.batched.cannotsamplerequiresinferenceexception.md)
Implements [ISerializable](https://docs.microsoft.com/en-us/dotnet/api/system.runtime.serialization.iserializable) ## Properties ### **TargetSite** ```csharp public MethodBase TargetSite { get; } ``` #### Property Value [MethodBase](https://docs.microsoft.com/en-us/dotnet/api/system.reflection.methodbase)
### **Message** ```csharp public string Message { get; } ``` #### Property Value [String](https://docs.microsoft.com/en-us/dotnet/api/system.string)
### **Data** ```csharp public IDictionary Data { get; } ``` #### Property Value [IDictionary](https://docs.microsoft.com/en-us/dotnet/api/system.collections.idictionary)
### **InnerException** ```csharp public Exception InnerException { get; } ``` #### Property Value [Exception](https://docs.microsoft.com/en-us/dotnet/api/system.exception)
### **HelpLink** ```csharp public string HelpLink { get; set; } ``` #### Property Value [String](https://docs.microsoft.com/en-us/dotnet/api/system.string)
### **Source** ```csharp public string Source { get; set; } ``` #### Property Value [String](https://docs.microsoft.com/en-us/dotnet/api/system.string)
### **HResult** ```csharp public int HResult { get; set; } ``` #### Property Value [Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32)
### **StackTrace** ```csharp public string StackTrace { get; } ``` #### Property Value [String](https://docs.microsoft.com/en-us/dotnet/api/system.string)