cant not attach to the local process and hit the breakpoints

I tried to debug by attaching to local process w3wp

When i open it with admin and attach to w3wp

it shows me this message in Console:

Input/Output redirection disabled: Debugger is attached to an already running process
"C:\Program Files\JetBrains\JetBrains Rider 2017.3.1\bin\runnerw.exe" "C:\Program Files\JetBrains\JetBrains Rider 2017.3.1\lib\ReSharperHost\JetBrains.Debugger.Worker32.exe" 50959

And when i run my asp.net page, it  wont hit my breakpoint.

However, at the same time, i try to attach to this local process on Visual studio and VS told me that this local process has alreadly been using.

when i stop the debug in Rider, my VS can attach to w3wp again.