net481 
namespace System.Web.UI.Design.WebControls
{
    [ToolboxItem(false)]
    public class RegexEditorDialog : Form
    {
        protected void cmdHelp_Click(object sender, EventArgs e);
    }
}
.NET Framework
1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net481
Assembly

System.Design , Version=4.0.0.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs an assembly reference to System.Design.

Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API