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.NET Windows Forms design time rules

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Is WinForms deprecated?

As we mentioned above, WinForms is still available but the status of “maintenance mode” likely means it has no long term future. As time passed by, especially in the last 5-10 years, new tools continued to mature and rise in popularity, and each one of them offered many powerful features.

What is form How do we create the form and managed at run time?

Windows Form Design at Run Time will allow users to Design Form at run time, save the form, open and reuse the existing Form. Users can add controls at Runtime from the Toolbar, design their Form, write their code for controls to perform some Action.

What provides the set of tools that we use at design time to place control on a form?

NET Framework provides a wealth of control authoring technology. Authors are no longer limited to designing composite controls that act as a collection of preexisting controls. Through inheritance, you can create your own controls from preexisting composite controls or preexisting Windows Forms controls.

Should I still use WinForms?

Compared to WPF, WinForms has much better design-time experience in Visual Studio. This itself is enough to choose WinForms. This is my experience with WinForms and WPF. However, you can choose the appropriate technology as per your requirements.


I have an object that starts a thread, opens a file, and waits for input from other classes. As it receives input, it writes it to disk. Basically, it's a thread safe data logging class...

Here's the weird part. When I open a form in the designer (Visual Studio 2008) that uses the object the file gets created. It's obviously running under the design time vhost process...

The odd thing is I've not been able to reproduce the issue in another project. I'm not sure what the rules are for code that gets executed in the designer and code that does not. For example, creating a file in a Windows Forms constructor doesn't actually create the file at design time...

What is the explanation? Is there a reference?