添加项目文件。

Live-Charts-master/UwpView/Points/PointExtensions.cs

@@ -0,0 +1,22 @@
+using Windows.Foundation;
+
+namespace LiveCharts.Uwp.Points
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public static class PointExtensions
+    {
+        /// <summary>
+        /// Offsets the specified x.
+        /// </summary>
+        /// <param name="point">The point.</param>
+        /// <param name="x">The x.</param>
+        /// <param name="y">The y.</param>
+        public static void Offset(this Point point, double x, double y)
+        {
+            point.X += x;
+            point.Y += y;
+        }
+    }
+}