add api comments for IInvalidatable

Change-Id: I48395e46cbb5c56af529ab0734c8ddc149a63c0e
Signed-off-by: hongqingli <hongqing.li@samsung.com>

diff --git a/ElmSharp/ElmSharp/EvasObjectEvent.cs b/ElmSharp/ElmSharp/EvasObjectEvent.cs
index 58cf855..96a3716 100755 (executable)
--- a/ElmSharp/ElmSharp/EvasObjectEvent.cs
+++ b/ElmSharp/ElmSharp/EvasObjectEvent.cs
@@ -21,6 +21,10 @@ using System.Linq;
 
 namespace ElmSharp
 {
+    /// <summary>
+    /// IInvalidatable is a interface which can be overrided by its children class.
+    /// Inherits IDisposable
+    /// </summary>
     public interface IInvalidatable : IDisposable
     {
         void MakeInvalidate();