Working with images from a PCL

Im creating an app using XLabs camerafunctionality but I do not understand how I can work with the images that gets saved on the disk of the device.
I use this code to take a photo:

public async Task TakePicture()
{
Setup ();

        ImageSource = null;

        return await _Mediapicker.TakePhotoAsync (new CameraMediaStorageOptions {
            DefaultCamera = CameraDevice.Front, MaxPixelDimension = 400
        }).ContinueWith (t => {
            if (t.IsFaulted)
            {
                Status = t.Exception.InnerException.ToString();
            }
            else if (t.IsCanceled)
            {
                Status = "Canceled";
            }
            else
            {
                var mediaFile = t.Result;
                ImageSource = ImageSource.FromStream(() => mediaFile.Source);


                string path = mediaFile.Path; //
                //Lets say I save all Paths to a DB for later use



                return mediaFile;
            }

            return null;
        }, _scheduler);
    }

So now I have acess to a list of Paths leading to images on the devices disk. Lets say that I now want to use my list of paths and display the images in a view (using Xaml). Do I have to do something platform-specifik in order to accomplish this? I see that the BitMapImage-class is used a lot but I cannot acess that class within my PCL. What would be the correct DataType to use?

Is there some samples demonstrating how to achieve this maybe?
Thank you!