Using `Array.Copy` to make array copy faster in StylusPointCollection (#5217)

* Using `Array.Copy` to make array copy faster in StylusPointCollection

* Using Span to improve performance

src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/Stylus/Common/StylusPointCollection.cs

@@ -195,17 +195,14 @@ internal StylusPointCollection(StylusPointDescription stylusPointDescription, in
                 if (dataLength > 0)
                 {
                     //copy the rest of the data
-                    data = new int[dataLength];
-                    for (int localIndex = 0, rawArrayIndex = i + startIndex; localIndex < data.Length; localIndex++, rawArrayIndex++)
-                    {
-                        data[localIndex] = rawPacketData[rawArrayIndex];
-                    }
+                    var rawArrayStartIndex = i + startIndex;
+                    data = rawPacketData.AsSpan(rawArrayStartIndex, dataLength).ToArray();
                 }
 
                 StylusPoint newPoint = new StylusPoint(p.X, p.Y, StylusPoint.DefaultPressure, _stylusPointDescription, data, false, false);
                 if (containsTruePressure)
                 {
-                    //use the algoritm to set pressure in StylusPoint
+                    //use the algorithm to set pressure in StylusPoint
                     int pressure = rawPacketData[i + 2];
                     newPoint.SetPropertyValue(StylusPointProperties.NormalPressure, pressure);
                 }