If a rule's OnSuccess or OnFailure action's Context is not defined (resulting in a null value), during execution of the rule's action a NullReferenceException is thrown during the construction of the ActionContext instance.
While the builtin Actions require Context information, it is possible that a custom action would not. The action itself should be responsible for handling context information that is missing by detecting missing items within the context dictionary. The action's code should determine if an exception is the proper response.
If a rule's OnSuccess or OnFailure action's Context is not defined (resulting in a null value), during execution of the rule's action a NullReferenceException is thrown during the construction of the ActionContext instance.
While the builtin Actions require Context information, it is possible that a custom action would not. The action itself should be responsible for handling context information that is missing by detecting missing items within the context dictionary. The action's code should determine if an exception is the proper response.
https://github.com/microsoft/RulesEngine/blob/dc5298989583954cd6aac598267747b4ce635f45/src/RulesEngine/Actions/ActionContext.cs#L19
Checking
contextfornullor using a null-coalescing operator would solve this issue.