How to dispose BitmapImage cache?

Question

I\'m facing a memory leak issue. The leak comes from here:

public static BitmapSource BitmapImageFromFile(string filepath)
{
    BitmapImage bi = new BitmapI         


        

Answer 1

I found the answer here. Seems like it's a bug in WPF.

I modified the function to include Freeze:

public static BitmapSource BitmapImageFromFile(string filepath)
{
    var bi = new BitmapImage();

    using (var fs = new FileStream(filepath, FileMode.Open))
    {
        bi.BeginInit();                
        bi.StreamSource = fs;                
        bi.CacheOption = BitmapCacheOption.OnLoad;
        bi.EndInit();
    }

    bi.Freeze(); //Important to freeze it, otherwise it will still have minor leaks

    return bi;
}

I also create my own Close function, which will be called before I close the ScatterViewItem:

public void Close()
{
    myImage.Source = null;
    UpdateLayout();
    GC.Collect();
}  

Because myImage is hosted in a ScatterViewItem, GC.Collect() must be called before the parent is closed. Otherwise, it will still linger in memory.