OutOfMemoryException on the mobile device

Question

I am developing an application that uses a mobile device to take a photo and send it using a web service. But after I took 4 photos, I get OutOfMemoryExceptionin the code below. I tried calling GC.Collect(), but that didn't help either. Maybe someone here can give me advice on how to deal with this problem.

public static Bitmap TakePicture()
{
    var dialog = new CameraCaptureDialog
    {
        Resolution = new Size(1600, 1200),
        StillQuality = CameraCaptureStillQuality.Default
    };

    dialog.ShowDialog();

    // If the filename is empty the user took no picture
    if (string.IsNullOrEmpty(dialog.FileName))
       return null;

    // (!) The OutOfMemoryException is thrown here (!)
    var bitmap = new Bitmap(dialog.FileName);

    File.Delete(dialog.FileName);

    return bitmap;
}

The function is called by the event handler:

private void _pictureBox_Click(object sender, EventArgs e)
{
    _takePictureLinkLabel.Visible = false;

    var image = Camera.TakePicture();
    if (image == null)
       return;

    image = Camera.CutBitmap(image, 2.5);
    _pictureBox.Image = image;

    _image = Camera.ImageToByteArray(image);
}

Answer 1

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public static Bitmap TakePicture()
{
    string filename;
    using(var dialog = new CameraCaptureDialog
    {
        Resolution = new Size(1600, 1200),
        StillQuality = CameraCaptureStillQuality.Default
    }) {

        dialog.ShowDialog();
        filename = dialog.FileName;
    }    
    // If the filename is empty the user took no picture
    if (string.IsNullOrEmpty(filename))
       return null;

    // (!) The OutOfMemoryException is thrown here (!)
    var bitmap = new Bitmap(filename);

    File.Delete(filename);

    return bitmap;
}

private void _pictureBox_Click(object sender, EventArgs e)
{
    _takePictureLinkLabel.Visible = false;

    using(var image = Camera.TakePicture()) {
        if (image == null)
           return;

        image = Camera.CutBitmap(image, 2.5);
        _pictureBox.Image = image;

        _image = Camera.ImageToByteArray(image);
    }
}

CutBitmap .., , .

Answer 2

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