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Microsoft introduced a new System.IO.MemoryMappedFiles namespace in .Net 4. Does anyone know if it will support alternate data streams? Thx!

+1  A: 

i am pretty sure that no. FileStream's filename validation didn't accept alternate data streams paths, i think here it will behave the same. why do you need ADS?

Andrey
ADS offers a wonderful mechanism for non-critical file-related storage. For example I could create a file index that can easily be recreated if the file was backed up.
Yurik