WPF 中的低分配绘图

WPF 中的低分配绘图

csharp
using System.Windows;
using System.Windows.Media;
namespace LowAllocationDrawingExample
{
    public partial class MainWindow : Window
    {
        private SolidColorBrush brush;
        private Pen pen;
        private Point startPoint;
        private Point endPoint;
        public MainWindow()
        {
            InitializeComponent();
            brush = new SolidColorBrush(Colors.Black);
            pen = new Pen(brush, 2);
            startPoint = new Point(50, 50);
            endPoint = new Point(250, 250);
        }
        protected override void OnRender(DrawingContext drawingContext)
        {
            base.OnRender(drawingContext);
            drawingContext.DrawLine(pen, startPoint, endPoint);
        }
    }
}