Wpf - Resizing icon, blurry image quantity

I'm attempting to first pull a icon from an executable file, save it to a particular file and display that in a WPF window.

The quality is perfectly fine at 32x32 but when I try to resize it to being larger, it starts to get blurry.

Image from my application, 32x32 image beside 100x100 image:

Image http://img821.imageshack.us/img821/8967/imageresizemine.jpg

As you can see, it's quite blurry, by comparison here's an image from a different application which is getting the icon from executable also (and even larger) so it's obviously possible.

Image http://img714.imageshack.us/img714/1842/imageresizeother.jpg

There are several topics on this (or at least related) but I'm not managed to figure out what exactly the problem is.

I'm displaying the image using this code.

<Image Height="100" 
       Width="100" 
       HorizontalAlignment="Left" 
       Source="{Binding ImagePath}" 
       RenderOptions.BitmapScalingMode="HighQuality"/>

I assume the issue is with the displaying of the image 开发者_运维问答rather then how it's saved initially but just in case...I'm saving the image using this code.

Bitmap image = Icon.ExtractAssociatedIcon(FilePath).ToBitmap();   
image.Save(imagePath, System.Drawing.Imaging.ImageFormat.Png);

ExtractAssociatedIcon only gets the 32x32 icon, even if the app's resources have others. You'll probably have to go all the way to p/invoke something to get any of the other icons in an exe.