In C #, How to get the value of a variable when it changes Without threads or timers

Question

int i = 0;

When changing the value of i :

i = (Atypical value)

then

 bool callback(int i) target = i; return true; 

In C #, How to get the value of a variable when it changes Without using threads or timers

Answer 1

Use property:

 private int _i = 0; public int i { get { return _i; } set { if (_i == value) { return; } _i = value; callback(value); } }