Assign value of a reference property to a variable

Question

I have a scenario where I want to pass in a reference of the value type bool (value type marked with ref) to a constructor of an other class and want to update its value in the other class. Something like this. Is there a way to hold the reference of the variable. (I marked things with public, and I know that public variables can be accessed from anywhere)

public class A
{
    public bool Update;
    public void DoSomething()
    {
        B b = new B(ref Update);
    }
}

public class B
{
    private ref bool _val; //Is it possible to create a variable like this. If not is there a way to achieve what I am doing.
    public B(ref bool value)
    {
        _val = value;
    }
    private void UpdateValue()
    {
        _val = true;
    }
}

Answer 1

Wrap value with the reference type

public class CanUpdate
{
    public bool Value { get; set; }
}

Then

public class B
{
    private readonly CanUpdate _canUpdate;

    public B(CanUpdate value)
    {
        _canUpdate = value;
    }

    private void UpdateValue()
    {
        _canUpdate.Value = true;
    }
}

Class A will "see" value changed by class B

public class A
{
    private CanUpdate CanUpdate;

    public A()
    {
        CanUpdate = new CanUpdate { Value = false };
    }

    public void DoSomething()
    {
        Console.WriteLine(CanUpdate.Value); // false

        var b = new B(CanUpdate);
        b.UpdateValue();

        Console.WriteLine(CanUpdate.Value); // true
    }
}

Having own dedicated type for a value improves readability and makes code more comprehensible for others.