Unfortunately no -- NDA / work-for-hire. Customer requested .NET but didn't care which language. We usually write Python, F# felt friendlier than C#. State classes looked like:

    type InitialState = {a : int; b : string}
    type IntermediateState = {a : int; b: string; c: string list}
    type FinishedState = {a: int; b: string}
    type ErrorState = {a: int; b: string; message: string}
    type State =
        | UninitializedState  
        | InitialState of InitialState
        | IntermediateState of IntermediateState
        | FinishedState of FinishedState
        | ErrorState of ErrorState
        | FinalState

And transition functions:

    let initialize (args : string list) (s:UninitializedState) : State =
        // create an initial state from args, not actually like this
        InitialState {a= 5; b="hello"}

I probably put too many types into my function signatures, but I'm new to this style.