小编pet*_*ter的帖子

我在F#中定义了以下接口

[<ServiceContract>]
type ICarRentalService =
    [<OperationContract>]
    abstract member CalculatePrice: pickupDate:DateTime -> returnDate:DateTime -> pickupLocation:string -> vehiclePreference:string -> float

然后我试着像这样实现它:

type CarRentalService() =
    interface ICarRentalService with
        override this.CalculatePrice(pickupDate:DateTime, returnDate:DateTime, pickupLocation:string, vehiclePreference:string) =
            5.5

编译时我得到以下编译错误:

This override takes a different number of arguments to the corresponding abstract member

我现在正在看东西,摆弄一个小时,我做错了什么？