How can two Windows Form applications communicate with each other to pass data?

Question

Windows Forms

There are 2 applications:
1) A server application that receives requests from the site (clicking buttons on the site, etc.) and writing data to variables (or other information storage)
2) A client application that every second (by a timer) must check the value of that or another variable that has been changed in the server application
How can I pass a value from variables from the server application to the client application?

Answer 1

WCF Description
Inter-Process Networking
Not sure, but try searching:

Inter-Process Communication

Answer 2

Try like this. The client will pull the method once per second, you will deserialize the response into a POCO object.
How to implement application control on Windows using Android?

Answer 3

There was already such a question here.
My answer: pipe
There were other options.