net9.0-windows10.0.22621
namespace System.Windows.Forms
{
    [DefaultEvent("Load")]
    [Designer("System.Windows.Forms.Design.FormDocumentDesigner, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(IRootDesigner))]
    [DesignerCategory("Form")]
    [DesignTimeVisible(false)]
    [InitializationEvent("Load")]
    [ToolboxItem(false)]
    [ToolboxItemFilter("System.Windows.Forms.Control.TopLevel")]
    public class Form : ContainerControl
    {
        [Experimental("WFO5001", UrlFormat = "https://aka.ms/winforms-warnings/{0}")]
        protected virtual void OnFormCornerPreferenceChanged(EventArgs! e);
    }
}
.NET 9.0
Information specific to net9.0
Platforms This API is only available when you target a specific platform:
Windows 7.08.010.0.1776310.0.1836210.0.1904110.0.2034810.0.2200010.0.22621
Information specific to net9.0-windows10.0.22621
Assembly

System.Windows.Forms , Version=9.0.0.0, PublicKeyToken=b77a5c561934e089

Referencing

Your project needs to set <UseWindowsForms>True</UseWindowsForms>.

Preview WFO5001: This API is marked as experimental.(more details)
Platform Restrictions

This API is only supported on the following platforms:

  • Windows >= 6.1
  • Built-in API
  • Package-provided API

12/03/2024
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