Short file name

I need a simple way to get short file name for display.
For example, I have full file name
C:\Dir1\Samples\Files\Doc\Figures.doc and maximum length 30, and result should be like this:
C:\Dir1\...\Doc\Figures.doc.

string s = ShortFileName("C:\\Dir1\\Samples\\Files\\Doc\\Figures.doc");

// s = "C:\Dir1\...\Doc\Figures.doc"

string ShortFileName(string fullName, int maxLen)
{
// ???
}