https://learn.microsoft.com/en-us/dotnet/api/system.windows.media.lineargradientbrush.startpoint?view=netframework-4.7.1
LinearGradientBrush.StartPoint Property (System.Windows.Media) | Microsoft Learn
Gets or sets the starting two-dimensional coordinates of the linear gradient.
property systemwindows mediastartpointmicrosoftlearn
https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.media.lineargradientbrush?view=windows-app-sdk-2.0
LinearGradientBrush Class (Microsoft.UI.Xaml.Media) - Windows App SDK | Microsoft Learn
Paints an area with a linear gradient.
windows appclassmicrosoftuixaml