C# Let multiple class share the same instance of another class -

is there way let multiple class share same instance of class? in c# program i've got 3 class gamelogic(a), fpscontroller(b), , spawnplayer(c).

in case class b , c use , alter variables in a, in order use variables i'm instantiating in 2 different classes , use dot notation access variable instance of a, problem after instantiated in different classes, change in instance.variable not share between b , c class @ all.

would static type way of solving this? or writing main better.

any suggestions appreciated.

there few ways. here one:

one way dependency injection. can pass instance of along constructors of b , c (or setter/property of b , c):

a = new a(); b b = new b(a); c c = new c(a); 

but doesn't allow change reference in both objects easily, seems problem. 1 way change reference, wrap reference in object somehow.

a nice way create context object , pass context object along b , c instead of passing a. context object plays role our wrapper. context object becomes more useful if multiple variables needs shared between them (the shared/global state) - see "context pattern". example:

public class context {     public a;     public ...other state want share...;      public context(a a) { this.a = a; ... } }  ...  a = new a();  context context = new context(a,...);  b b = new b(context); c c = new c(context); 

depending on situation, static variable might fine, however. (or singleton)

(in cases passing a-instance along methods of b , c, rather constructor, might better - current version of (and might more thread-safe))