Change first variable automatically, when second is changed. How?

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We have such options like ref and out.
I wanna do like next:

int a = 5;
int b = a;
a = 10;
b should change to equal 10.

So, how?

Posted 17-Feb-15 22:17pm

Ziya1995

Updated 17-Feb-15 22:31pm

v3

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3 solutions

Solution 3

You could use pointers.

C#

static void Main(string[] args)
      {

          unsafe
          {
              int a = 5;
              int* b = &a;

              a = 10;

              Console.WriteLine("a = {0}, b = {1}", a, *b);
              Console.ReadLine();
          }

      }

Posted 17-Feb-15 22:37pm

John C Rayan

Solution 2

Ref,

1) Original Values changes are not reflecting in reference types varaiable

Posted 17-Feb-15 22:24pm

RajeeshMenoth

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Thomas Daniels · Accepted Answer · 2015-02-17T22:22:00

You can create a property:

C#

int _a;
int a
{
    get
    {
        return _a;
    }
    set
    {
        _a = value;
        _b = value;
    }
}

int _b;
int b
{
    get
    {
        return _b;
    }
    set
    {
        _b = value;
    }
}

These properties should be created inside a class, but outside a method.

What does this do? When you want to get the value of a, the getter will return _a, the field. When you want to set the value of a, the setter will change the value of both _a and _b, and _b is returned by the getter of b.

Read more about properties here:
MSDN - Properties (C# Programming Guide)[^]