Single C# API to access dropbox, iCloud, SkyDrive, etc.?

Hi all;

Is there a library that provides access to all the different cloud storage systems out there? What we need is pretty simple:

1. A way to get folder contents for a FileOpen dialog box.
2. A way to read the selected file.
3. Optional: a FileOpen dialog that does all the work to show the files and select one.

thanks - dave

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