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Rectangle rectangle = new Rectangle();
rectangle.Stroke = Brushes.Black;
rectangle.StrokeThickness = 2;
rectangle.Height = 100;
rectangle.Width = 100;
Canvas.SetLeft(rectangle, 50);
Canvas.SetTop(rectangle, 50);
this.canvas.Children.Add(rectangle);
Rectangle rectangle = new Rectangle();
rectangle.SetValue(Canvas.TopProperty, 50);
rectangle.SetValue(Canvas.LeftProperty, 50);
xaml中:
<Canvas>
<Rectangle Canvas.Left="50" Canvas.Top="50" Stroke="Black" StrokeThickness="2" Height="100" Width="100"/>
</Canvas>