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What is weird is that, Team Foundation source control displays “+” for folders with no subfolders.
it becomes apparent when you click on the bin folder.
Why does team foundation source control displays “+” folers with no subfolders?
It’s a performance optimisation so that the view doesn’t have to enumerate the folder contents in order to decide whether it should draw a + or not.
This pattern is often followed by programs which offer a view of hierarchical data on remote systems where the performance penalty for listing a node’s contents can be large.