Request with property set to false is not send in the query string

[Casper Bollen]

I have a request class with a boolean property. When I set the property to true, the value is send with the request, however, when the property is set to false, the property is not set in the query string (see snapshot). So, when I set the property to default true, I cannot send a request with the property set to false:

The code:

    type GetPatientAdmissionInfo () =
        interface IReturn<PatientAdmissionInfo seq>
        member val Department = "" with get, set
        member val OnlyAdmitted = true with get, set
        member val Page = 0 with get, set
        member val Size = 0 with get, set

This is F#, but directly translates to a regular POCO with auto implemented properties.