[Solved] How i can free my application memory in c#?

Question

1) how can I free my memory or increase the maximum used memory?

Are you receiving an OutOfMemoryException and your memory isn’t filled up in your machine? This might be due to x86 compilation and you should change it to x64.

2) is there are any another way to get all my pictures to picture box without filling my memory?

Yes and no. If you are using Bitmap it will allocate the image in the memory. If you are recreating the image later with all the images together without compressing it, then you could be also losing some memory if you are not disposing the Bitmaps correctly. You could load them, compress them, and then dispose the original one, keeping the compressed/optimized one in memory.

Besides, remember to always dispose your Bitmap after using it. The GC usually takes care of them, but you should always dispose them:

using (Bitmap bitmap = new Bitmap("file.jpg")
{
     // bitmap handling here
}

Of course, if you are displaying it in a picturebox you can’t dispose it, but again, you are not being completely clear in your question.

Without your code I cannot provide you a better answer, and I’ll gladly edit this one if you update your question.

Read:

Compress bitmap before sending over network

When do I need to use dispose() on graphics?

Update

Upon fixing your thread I’ve noticed you’ve given an image but the formatting was broken.

Read my answer and it should help you (specially the part of compression). You can also change to x64.

Update 2 – Compression code example

    public void ExampleMethod()
    {
        pictureBox1.Image = GetCompressedFile("file.jpg", quality: 10);
    }

    private Image GetCompressedFile(string fileName, long quality)
    {
        using (Bitmap bitmap = new Bitmap(fileName))
        {
            return GetCompressedBitmap(bitmap, quality);
        }
    }

    private Image GetCompressedBitmap(Bitmap bmp, long quality)
    {
        using (var mss = new MemoryStream())
        {
            EncoderParameter qualityParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
            ImageCodecInfo imageCodec = ImageCodecInfo.GetImageEncoders().FirstOrDefault(o => o.FormatID == ImageFormat.Jpeg.Guid);
            EncoderParameters parameters = new EncoderParameters(1);
            parameters.Param[0] = qualityParam;
            bmp.Save(mss, imageCodec, parameters);
            return Image.FromStream(mss);
        }
    }

In the quality parameter you set the quality. 100 means 100%, 50 means 50%.

Try setting quality as 10 and see if it works.

Remove all Bitmap bmp = new Bitmap from the code, and display with your PictureBoxInstance.Image = GetCompressedFile(...);

Check the ExampleMethod().

Code based from: https://stackoverflow.com/a/48274706/4352946

You have to remember though, that even using Dispose, the memory won’t be freed right away, you should wait the GC for that.

P.S: compressing the file on-the-go you MIGHT end up with both images (the compressed and uncompressed) in the memory

Accepted Answer