我不知道这是否存在于Visual Studio 2008，但在Visual Studio 2010+你可以很容易地做到这一点:

不要选择任何东西，然后按Ctrl + C，然后(不做任何其他事情)按Ctrl + V

虽然我意识到这不是一个键盘快捷键，但我想我应该添加这个，因为它不需要使用剪贴板，可能会帮助到一些人。

突出显示要复制的行。 按控制，鼠标单击突出显示的文本，并拖动到您想要去的地方。它将复制突出显示的文本。

I use application link:AutoHotkey with below code saved in CommentDuplikateSaveClipboard.ahk file. You can edit/remove shortcuts it is easy. I have link to this file "Shortcut to CommentDuplikateSaveClipboard.ahk" in Autostart in windows. This script protect your clipboard. If you are more curious you would add shortcuts to thisable/enable script. I sometimes use very impressive Multi Clipboard script to easy handle with many clips saved on disk and use with CTRL+C,X,V to copy,paste,cut,next,previous,delete this,delete all.

;CommentDuplikateSaveClipboard.ahk

!c:: ; Alt+C === Duplicate Line
^d:: ; Ctrl+D
ClipSaved := ClipboardAll
Send, {END}{SHIFTDOWN}{HOME}{SHIFTUP}{CTRLDOWN}c{CTRLUP}{END}{ENTER}{CTRLDOWN}v{CTRLUP}{HOME}
Clipboard := ClipSaved
ClipSaved =
return

!x:: ; Alt+X === Comment Duplicate Line
ClipSaved := ClipboardAll
Send, {END}{SHIFTDOWN}{HOME}{SHIFTUP}{CTRLDOWN}c{CTRLUP}{LEFT}//{END}{ENTER}{CTRLDOWN}v{CTRLUP}{HOME}
Clipboard := ClipSaved
ClipSaved =
return

!z:: ; Alt+Z === Del uncomment  Line
ClipSaved := ClipboardAll
Send, {END}{SHIFTDOWN}{UP}{END}{SHIFTUP}{DEL}{HOME}{DEL}{DEL}
Clipboard := ClipSaved
ClipSaved =
return

!d:: ; Alt+D === Delete line
Send, {END}{SHIFTDOWN}{UP}{END}{SHIFTUP}{DEL}
return

!s:: ; Alt+S === Swap lines
ClipSaved := ClipboardAll
Send, {END}{SHIFTDOWN}{UP}{END}{SHIFTUP}{CTRLDOWN}x{CTRLUP}{UP}{END}{CTRLDOWN}v{CTRLUP}{HOME}
Clipboard := ClipSaved
ClipSaved =
return

!a:: ; Alt+A === Comment this line, uncomment above
Send, {END}{HOME}//{UP}{HOME}{DEL}{DEL}
return

您需要的命令是Edit.Duplicate。它被映射到CtrlE, CtrlV。这不会覆盖你的剪贴板。

如果你有一个macos版本，cmd+shift+D可以帮你完成这项工作

在Visual Studio 2013中，可以使用Ctrl+C+V