Notes

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace TestWpf
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
const double Rad2Deg = 180.0 / Math.PI;
const double Deg2Rad = Math.PI / 180.0;
public MainWindow()
{
InitializeComponent();

// Create a blue and a black Brush
SolidColorBrush yellowBrush = new SolidColorBrush();
yellowBrush.Color = Colors.Yellow;

Polygon yellowPolygon = new Polygon();

yellowPolygon.Fill = yellowBrush;

// Create a collection of points for a polygon
System.Windows.Point Point1 = new System.Windows.Point(25, 120);
System.Windows.Point Point2 = new System.Windows.Point(145, 120);
System.Windows.Point Point3 = new System.Windows.Point(145, 150);
System.Windows.Point Point4 = new System.Windows.Point(25, 150);
PointCollection polygonPoints = new PointCollection();
polygonPoints.Add(Point1);
polygonPoints.Add(Point2);
polygonPoints.Add(Point3);
polygonPoints.Add(Point4);
// Set Polygon.Points properties
yellowPolygon.Points = polygonPoints;
// Add Polygon to the page
myGrid.Children.Add(yellowPolygon);


SolidColorBrush redBrush = new SolidColorBrush();
redBrush.Color = Colors.Red;

Polygon rotatedRectangle = new Polygon();
rotatedRectangle.Fill = redBrush;

System.Windows.Point Point1a = new System.Windows.Point(25, 120);
System.Windows.Point Point2a = new System.Windows.Point(145, 120);
System.Windows.Point Point3a = new System.Windows.Point(145, 150);
System.Windows.Point Point4a = new System.Windows.Point(25, 150);
PointCollection polygonPointsa = new PointCollection();
polygonPoints.Add(Point1a);
polygonPoints.Add(Point2a);
polygonPoints.Add(Point3a);
polygonPoints.Add(Point4a);
// Set Polygon.Points properties
rotatedRectangle.Points = polygonPointsa;

RotateTransform rotateTransform1 = new RotateTransform(45, -50, 50);

rotatedRectangle.RenderTransform = rotateTransform1;











}

private double CalculateAngle(double X1, double Y1, double X2, double Y2)
{

return Math.Atan2(Y1 - Y2, X2 - X1) * Rad2Deg;

} //Line'ın eğimini hesaplar
}
}