In Vscode using intergrate Powershell, How to get rid of these things. If I have a selection by using mouse, then I can copy the text. In other case, I have a selection using keyboard, such as shift+left/right arrow, then hit ctrl+c, it will replace the selection by ^C. Likewise with ctrl+d,...
And It's just happend in Vscode, as I hit ctrl+c 3 times:
@cmoon2000 I'm having a hard time repoing this.
Can you confirm something for me?
If you go to this drop down on the right, can you try it with "PowerShell Integrated Console" selected?

From the screenshots, it looks like your in regular PowerShell shell that the vscode team ships with vscode. I can repro that in that shell, I see ^C^C^C^C^C^C^C^C.
I think this needs to be open against vscode. @rkeithhill, @daviwil, is that correct?
I'm not sure why the ^C isn't cancelling the command prompt for plain powershell.exe in the integrated terminal UI. @cmoon2000, can you verify what you're trying to do? Are you trying to copy text in the terminal with the keyboard or are you trying to use Ctrl+C to cancel the current prompt (like you show in the Windows PowerShell window)? I couldn't tell which scenario is the one you are trying to get working.
@daviwil , yeah! those are 2 different cases. I want both of them work out. Unfortunately they don't.
@tylerl0706 It made same result like you when I use Powershell Integrated Console
@cmoon2000 so that's good that it made the same result as me. What about copy and pasting? Does copy and pasting work as expected in the PowerShell Integrated Console?
@tylerl0706 It works normally
Great! So this is not actually a problem with the PowerShell extension for VSCode. Because we only supply the Integrated Console. Your issue is with VSCode itself.
I'd recommend filing an issue here: https://github.com/Microsoft/vscode
Although, I feel like this issue already is open over there so it might be worthwhile to search for it before opening a new one.
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Great! So this is not actually a problem with the PowerShell extension for VSCode. Because we only supply the Integrated Console. Your issue is with VSCode itself.
I'd recommend filing an issue here: https://github.com/Microsoft/vscode
Although, I feel like this issue already is open over there so it might be worthwhile to search for it before opening a new one.