:rotation_light: minor update

ch03_DataBinding/ex_BindingToA2dArray_v2/MyLayouts/MatrixLayout.cs

@@ -8,7 +8,7 @@ public class MatrixLayout : Layout
         = BindableProperty.Create(nameof(NbColumns), 
                                   typeof(int),
                                   typeof(MatrixLayout),
-                                  10, propertyChanged: OrientationChanged);
+                                  10);
 
     public int NbColumns
     {
@@ -20,7 +20,7 @@ public class MatrixLayout : Layout
         = BindableProperty.Create(nameof(NbRows), 
                                   typeof(int), 
                                   typeof(MatrixLayout), 
-                                  10, propertyChanged: OrientationChanged);
+                                  10);
 
     public int NbRows
     {
@@ -32,7 +32,7 @@ public class MatrixLayout : Layout
         = BindableProperty.Create(nameof(HorizontalSpacing), 
                                   typeof(double), 
                                   typeof(MatrixLayout), 
-                                  0.0, propertyChanged: OrientationChanged);
+                                  0.0);
 
     public double HorizontalSpacing
     {
@@ -44,7 +44,7 @@ public class MatrixLayout : Layout
         = BindableProperty.Create(nameof(VerticalSpacing), 
                                   typeof(double), 
                                   typeof(MatrixLayout), 
-                                  0.0, propertyChanged: OrientationChanged);
+                                  0.0);
 
     public double VerticalSpacing
     {
@@ -56,10 +56,4 @@ public class MatrixLayout : Layout
     {
         return new MatrixLayoutManager(this);
     }
-
-    static void OrientationChanged(BindableObject bindable, object oldValue, object newValue)
-    {
-        // var layout = bindable as MatrixLayout;
-        // layout?.InvalidateMeasure();
-    }
 }