About the establishment of global variables in C #

Recently, I was working on a mobile development project. I needed a global class method to be called in various forms. After searching for it online for a long time, I finally solved the problem. How to declare the entireProgramCan all access its instances? The following method is used to create

Create a class to store global variables for ease of management. Then, declare the class instance in the class as follows:

Public static user class variable name = new user class ()
;

We need to know that we must use static in declaring global classes. We can use the above form to create an instance so that each form can call it.