Verify Method does not have a Switch Label for Lambda Functions

This piece of code in CompoundStep.cs needs an extra case label.

var r3 = AllProperties
            .Select(
                x => x switch
                {
                    StepProperty.SingleStepProperty singleStepProperty => singleStepProperty.Step
                        .Verify(stepFactoryStore),
                    StepProperty.StepListProperty stepListProperty => stepListProperty.StepList
                        .Select(s => s.Verify(stepFactoryStore))
                        .Combine(ErrorList.Combine)
                        .Map(_ => Unit.Default),
                    StepProperty.VariableNameProperty _ => Unit.Default,
                    _ => throw new ArgumentOutOfRangeException(nameof(x), x, null)
                }
            );