Visual Studio 2010: Opening a file using command line resets window layout

The following command works fine. It opens a new instance of Visual Studio 2010:

devenv

But if I specify a file name, Visual Studio's window layout will be reset.

devenv "D:\Temp\test.txt"

Any ideas? Thanks.

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Update:

This command works:

devenv /command "open D:\Temp\test.txt"

But the file path cannot contain spaces. The following command give开发者_C百科s an error: "The operation cannot be completed. The system cannot find the file specified":

devenv /command "open D:\Temp\test 2.txt"

I tried:

devenv /command "open 'D:\Temp\test 2.txt'"

But got the same error.

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OK I think understand now.

Visual Studio uses different layouts for different situations. It uses a special layout when it is opened from command line with a specified file name.

I have never custom this layout so it looks like the default one, made me thought the layout was reset.