[NUI] Add an exception when deleting a view that is not child

Signed-off-by: huiyu.eun <huiyu.eun@samsung.com>

diff --git a/src/Tizen.NUI/src/public/BaseComponents/ViewPublicMethods.cs b/src/Tizen.NUI/src/public/BaseComponents/ViewPublicMethods.cs
index 1d6bd79..4541357 100755 (executable)
--- a/src/Tizen.NUI/src/public/BaseComponents/ViewPublicMethods.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/ViewPublicMethods.cs
@@ -165,6 +165,11 @@ namespace Tizen.NUI.BaseComponents
             if (child == null || child.GetParent() == null) // Early out if child null.
                 return;
 
+            if (child.Parent != this)
+            {
+                throw new System.InvalidOperationException("You have deleted a view that is not a child of this view.");
+            }
+
             bool hasLayout = (layout != null);
 
             // If View has a layout then do a deferred child removal