System.OutOfMemoryException while reading and binding image from isolated storage - windows-phone-7

Question

This is the code I am using for binding image in XAML
<Border toolkit:TiltEffect.IsTiltEnabled="true" Height="350" Width="400" Grid.ColumnSpan="3">
<Grid Height="350" Width="400" Margin="70,0,70,0" x:Name="Container1">
<Grid.Background>
<ImageBrush ImageSource="{Binding ImageCollection[0]}" Stretch="Uniform" AlignmentX="Left" AlignmentY="Center"/>
</Grid.Background>
<i:Interaction.Triggers>
<i:EventTrigger EventName="Tap">
<i:InvokeCommandAction Command="{Binding ImageTapCommand}" CommandParameter="CONTAINER0"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</Grid>
</Border>
Likewise I am using 4 border for displaying my recent images.
In my ViewModel I am using the below method for reading image from isolated storage.
public Stream GetFileStream(string filename, ImageLocation location)
{
try
{
lock (SyncLock)
{
if (location == ImageLocation.RecentImage)
{
filename = Constants.IsoRecentImage + #"\" + filename;
}
using (var iSf = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!iSf.FileExists(filename)) return null;
var fs = iSf.OpenFile(filename, FileMode.Open, FileAccess.Read);
return fs;
}
}
}
catch (Exception ex)
{
return null;
}
}
And after getting the stream I will use this below written method four building the WritableBitmap for UI binding
private WriteableBitmap BuildImage(Stream imageStream)
{
using (imageStream)
{
var image = new BitmapImage();
image.SetSource(imageStream);
return new WriteableBitmap(image);
}
}
In this case my issue is after navigating to and from my page for two - three times. The app crashes on BuildImage() method where I am using " image.SetSource(imageStream);" method. I tried many alternatives but failed. The exception I am getting is "System.OutOfMemoryException "
I tried Image control instead of Image brush.
I tried Bitmap instead of WritableBitmap etc. but the result is same.
The app crashing rate will reduce if I use small images. But the crash rate is high with the images taken through camera.
I am trying for a solution to this issue for last one week, But didn't find any alternative to fix the issue.
I found a link that talks about similar issue But didn't get many to solve the issue

Answer 1

Try this,
var bitmapImage = new BitmapImage();
bitmapImage.SetSource(stream);
bitmapImage.CreateOptions = BitmapCreateOptions.None;
var bmp = new WriteableBitmap((BitmapSource) bitmapImage);
bitmapImage.UriSource = (Uri) null;
return bmp;

Answer 2

Silverlight caches images by default to improve performance. You should call
image.UriSource = null after using the BitmapImage to dispose of the resources.

Answer 3

Are you reseting/disposing the IsolatedStorageFileStream and the IsolatedStorageFile after you use them?

Answer 4

Have you tried forcing the garbage collector to run to see if that makes any difference.
GC.Collect();
This is not intended as a solution - you should never have to call GC.Collect, but it might help determine whether your problem is a memory leak or just a delay in the memory being reclaimed.