net462 
namespace System.Windows.Controls.Ribbon.Primitives
{
    public class RibbonTabHeadersPanel : Panel, IScrollInfo
    {
        public double ExtentWidth { get; }
    }
}
.NET
5.06.07.08.09.0
.NET Core
3.03.1
.NET Framework
4.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net462
Assembly

System.Windows.Controls.Ribbon , Version=4.0.0.0, PublicKeyToken=b77a5c561934e089

Referencing

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

Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API