completed the branch

src/Shared/HandyControl_Shared/Data/Enum/TransitionMode.cs

@@ -0,0 +1,16 @@
+namespace HandyControl.Data
+{
+    public enum TransitionMode
+    {
+        Right2Left,
+        Left2Right,
+        Bottom2Top,
+        Top2Bottom,
+        Right2LeftWithFade,
+        Left2RightWithFade,
+        Bottom2TopWithFade,
+        Top2BottomWithFade,
+        Fade,
+        Custom
+    }
+}