How do you pick or capture a photo in MAUI?

Use MediaPicker.Default.PickPhotoAsync to choose from the gallery or CapturePhotoAsync to use the camera (camera requires permission and hardware). Both return a FileResult you can open as a stream to display or upload.

var photo = await MediaPicker.Default.CapturePhotoAsync();
if (photo is not null)
{
    using var stream = await photo.OpenReadAsync();
    // save or display
}