Use the same void between multiple forms in the same project?

Question

Is possible to use the same void between multiple forms in the same project?

If it possible, how is it done?

Answer 1

You can see for example the answer from RoninB in this thread :

https://social.msdn.microsoft.com/Forums/en-US/40f0c893-60f2-431d-aa9d-94014b6af58d/global-use-functions-in-c-2010?forum=csharplanguage

Answer 2

One option is using a thread safe singleton

public sealed class AppOperations
{
    private static readonly Lazy<AppOperations> Lazy =
        new(() => new AppOperations());

    private const int _max = 5;
    public static AppOperations Instance => Lazy.Value;

    public int Index { get; set; }

    public void Increment()
    {
        if (Index + 1 < _max)
        {
            Index++;
        }
        else
        {
            Index = 0;
        }
    }

    public void Decrement()
    {
        Index--;
        if (Index < 0)
        {
            Index = _max - 1;
        }
    }
}

Usage in one form

AppOperations.Instance.Increment();

In another form var value = AppOperations.Instance.Index;