对于Visual Studio Code 2019:

使用ctrl+k和ctrl+s编辑菜单键盘快捷键

编辑“向下复制一行”(Shift + Alt + DownArrow)到你自己的快捷方式。

您可以通过命令ID: editor.action.copyLinesDownAction找到它

对我来说，ctrl+d

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

Ctrl + D是VS 2017 v15.6中引入的一个新快捷键，它的作用似乎和Ctrl + E, V完全一样

Ctrl + D将复制光标所在的行，并将其插入到焦点行的正下方。如果希望复制一组特定的代码，只需在调用duplicate code命令之前选择要复制的代码部分。

它不会影响你的剪贴板

源

Ctrl + D为我工作在VS2012与Resharper。这是Resharper的热键。

在Visual studio 2017或其他版本不需要宏或扩展，

进入“工具>选项>环境>键盘” 在显示命令下包含:写编辑。重复的 将光标置于“按快捷键:”，按“Ctrl + D”，单击“分配”按钮 单击OK保存新的键盘快捷方式

VS 2017的Ctrl + D或Ctrl + C;Ctrl + V 他们都为我工作。