c# picturebox memory releasing problem

Question

I'm a newby in C#. I have to repeatedly refresh a GUI picture box in a worker thread. The image is acquired from a camera polling a driver with a GetImage method that retrives the image to be displayed. Even if I allocate the bitmap using directive "using" and explicitly call G.C, memory seems to be never deallocated. The worker thread is something like this: ``` while (true) { // request image with IR signal values (array of UInt16) image = axLVCam.GetImage(0); lut = axLVCam.GetLUT(1); DrawPicture(image, lut); //GC.Collect(); } ``` While the DrawPicture method is something like ``` public void DrawPicture(object image, object lut) { [...] // We have an image - cast it to proper type System.UInt16[,] im = image as System.UInt16[,]; float[] lutTempConversion = lut as float[]; int lngWidthIrImage = im.GetLength(0); int lngHeightIrImage = im.GetLength(1); using (Bitmap bmp = new Bitmap(lngWidthIrImage, lngHeightIrImage)) { [...many operation on bitmap pixel...] // Bitmap is ready - updat…

Accepted Answer

`Image` implements `IDisposable`, so you should call `Dispose` on each `Image` instance that you create, when it is no longer needed. You could try to replace this line in your code:

```
pic.Image = System.Drawing.Image.FromHbitmap(bmp.GetHbitmap());
```

With this:

```
if (pic.Image != null)
{
    pic.Image.Dispose();
}
pic.Image = System.Drawing.Image.FromHbitmap(bmp.GetHbitmap());
```

This will dispose the previous image (if any) before the new one is assigned.

c# picturebox memory releasing problem

Solution

Problem