New Post: WriteableBitmap "out of memory exception" or COMException 88980003

Were you ever able to find fixes for the memory stuff?

I believe this is .NET 4.5 and up only, but putting

<runtime>
  <gcAllowVeryLargeObjects enabled="true" />
</runtime>

into your App.config will help depending on what exactly you're doing. Basically on 64-bit platforms, enables arrays that are greater than 2 gigabytes (GB) in total size, which may solve certain issues (it did with me but that was because I was using arrays along with WriteableBitmapEx).