How to check logical and physical file size on disk using C# file API -

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how read logical , physical file size using c# api.

enter image description here

(new fileinfo(path).length)

is actual size. size on disk, don't think there's api it, can using actual size, , cluster size.

there's info on calculation required here: http://social.msdn.microsoft.com/forums/en-us/vsexpressvcs/thread/85bf76ac-a254-41d4-a3d7-e7803c8d9bc3


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