If I attempt to edit a Silverlight 2.0 project in Expression Blend with a solution which also contains a web which in turn contains a subdirectory with 40,000 image files (think DeepZoom .png's), Blend grinds to a halt and becomes unusable.  Presumably, it's continuously checking for dependency changes, and prioritizes this activity over user input.

Is there any way to make Blend ignore a particular subdirectory?

Repro:

1. Right click on page.xaml or app.xaml in project with 40,000 files in subdirectory and select "Open in Expression Blend..."..

2. See the message from Blend: "Opening this website may take a long time.  Do you wish to continue?"  Say yes.

3. Wait a very long time.  Eventually the Blend UI becomes slightly responsive, but it's so slow as to be unusable.

4. Shut everything down.  Remove directory with 40,000 images.

5. Repeat beginning sequence, and now Blend runs just fine.

Components:  
Silverlight 2.0 RC0
VS2008 9.0.30729.1
Net 3.5 SP1
Blend 2.0, SP1 Preview

Hi,

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Amanda Wang
Microsoft Online Community Support