Visual Studio TFS shows unchanged files in the list of pending changes

Solution 1:

This is normal if a file becomes automatically checked out due to a change, and if ultimately the contents of the file are changed back to it's original state. At that point you would see the message about identical contents upon comparison.

This blog entry describes a not-so intuitive way of dealing with this; and in the comments there is an even better suggestion on dealing with it through the command line via TFS power tools.

TFS pending changes ignoring identical files...

Solution 2:

Recently I just updated VS2010 to VS 2013, and this issue even worse. When you use compare, files that are identical don't pop up at all. I hate this because you could not figure out which files are truly changed until you check the compare files carefully.

Finally I figure out a workaround for this:
Add "Undo unchanged checkouts" in the external tools:

• Command: tfpt.exe
• Arguments: uu . /noget /recursive
• Initial directory: $(SolutionDir)

After running this command, TFS will automatically undo all the redundant changes in the files.
But these files still keep check out status, actually they are already undo and same as the latest version. I think It is a bug in TFS. You just need click Refresh icon in the toolbar under solution explorer, these files will be refreshed and show the correct status!