Client generation for Action with optional bool parameter

Imagine this sample action:

public async Task<IActionResult> Get([FromQuery]string order = null, [FromQuery]bool IsOrder = true)

The NSwag generated client method looks like this (with generateOptionalParameters):

public async Task<Object> GetAsync(string order = null, bool? IsOrder)
{
    if (isOrder == null)
        throw new ArgumentNullException("IsOrder");

        ...
}

This looks weird to me. Why is the generated parameter not like the one from the action? Is this a limitation of reflection? This way I have to specify a value for an otherwise optional parameter. And as a consumer I dont even know what the default value for the bool is here, if I dont bother.

[RicoSuter]

What do you think?

https://github.com/RSuter/NSwag/commit/202c1b8dd1acc63ca945508fb7d27868838f9c17

[zuckerthoben]

Looks good to me. Tested it with the ci build (https://ci.appveyor.com/project/rsuter/nswag-25x6o/build/2795/artifacts).