c# - Creating a reference to another object -

i want make object stores reference object. have code this:

public partial class form1 : form {     int test = 1;     store st;             public form1()     {         initializecomponent();     }      private void form1_load(object sender, eventargs e)     {         st = new store(test);     }      private void button1_click(object sender, eventargs e)     {         test = 7;     }      private void button2_click(object sender, eventargs e)     {         label1.text = convert.tostring((int)st.o);     } }  public class store {     public object o;      public store(object obj)     {         o = obj;     } } 

if click button2 - can see "1" in label. if click button2 , button1 - still see "1". how should alter code i'll see "7" in case?

when create store object you're evaluating value of test variable, , storing that value rather the test variable. if want have way of evaluating variable value later, can use lambda close on variable, since closures in c# close on variables, not values.

public partial class form1 : form {     int test = 1;     store<string> store;      public form1()     {         initializecomponent();     }      private void form1_load(object sender, eventargs e)     {         store = new store<string>(() => test.tostring());     }      private void button1_click(object sender, eventargs e)     {         test = 7;     }      private void button2_click(object sender, eventargs e)     {         label1.text = store.getvalue();     } }  public class store<t> {     private func<t> function;      public store(func<t> function)     {         this.function = function;     }      public t getvalue()     {         return function();     } } 

note made few changes names of items in line standard c# conventions, rather having store expose generator function's field publicly, provide function lets value, , i've made generic, rather using object, both avoids boxing, , prevents need cast object returned store.