Can't find PropertyChanging Attribute

Hello kekyo, I have a question about using PropertyChanging Attribute.

As the Documentation, not only PropertyChanged but also PropertyChanging can be used. But when I try to use it, VS can’t find the symbol.

If I understood correctly, both following code can available, isn’t it?

public WindowState MainWindowState { get; set; }
[PropertyChanging(nameof(MainWindowState))]
private ValueTask WindowStateChanged(WindowState state)
{
	MainShowInTaskbar = true;
	return default;
}

public WindowState MainWindowState { get; set; }
[PropertyChanged(nameof(MainWindowState))]
private ValueTask WindowStateChanged(WindowState state)
{
	if (state == WindowState.Minimized)
	{
		MainShowInTaskbar = false;
	}
	return default;
}

Is PropertyChanging Attribute not been implemented yet?

[kekyo]

Around this of Epoxy.Build is where the PropertyChangedAttribute and generate code for it. I think that similar code could be inserted here to support PropertyChangingAttribute.

It is okay if it is too difficult to implement. Even if you give up, I maybe implement it in later 😃

[sappho192]

Thank you for such a detailed explanation and tips.

The binding system is a better structure, but it is not perfect, and I personally think it is better not to go too deep into it, because there are some problems such as the lack of clear subject-object relationship and the difficulty in dealing with triggers of events.

Yes, recently I started to realizing this at some point. It is very paradoxical that the more I get to know, the more I don’t know. 😂

It is okay if it is too difficult to implement. Even if you give up, I maybe implement it in later 😃

Actually I’m little intimidated of decompiler and source generater codes in Epoxy.Build, but I still want to give it a try! Thank you 😃