Visual Studio not recognizing InputValue or InputSystem

I'm writing my scripts for a new project. I just installed the new input system, but when I try to add the function "OnMove" Visual Studio draws a red line under "InputValue" because it doesn't recognize the type.
I tried to add "using UnityEngine.InputSystem" to the top of the file but then it underlines InputSystem and says the namespace doesn't exist.
I closed Visual Studio and re-opened it again but it still underlines it.

What am I missing? What am I supposed to do to get Visual Studio to work with the Input System properly?

 

Make sure you have Input Systems installed through the package manager.

 

It is, this is an issue with Visual Studio not realizing that I have it.
The code compiled and everything; I just have Visual Studio squawking at me like I had an error.

...Or had, anyway. After opening up another script the issue went away. Strange that opening a new scripts solved the problem when resetting the program did not.
Thanks for trying to help, at any rate.

 

the same happens to me, can somebody help please?

 

The same problem happened to me.
Resolved by adding:
using UnityEngine.InputSystem;

 

ur a chad, thanks