[WindowsBase] Add some implementation to class GroupDescription

diff --git a/mcs/class/WindowsBase/System.ComponentModel/GroupDescription.cs b/mcs/class/WindowsBase/System.ComponentModel/GroupDescription.cs
index 4cd981ae02bacd2827cde6a74eff8f36fa612f2c..ed9d824c339d54b0b75b502eb2f7ff8b274dd824 100644 (file)
--- a/mcs/class/WindowsBase/System.ComponentModel/GroupDescription.cs
+++ b/mcs/class/WindowsBase/System.ComponentModel/GroupDescription.cs
@@ -33,7 +33,6 @@ namespace System.ComponentModel {
        {
                protected GroupDescription ()
                {
-                       throw new NotImplementedException ();
                }
 
                public ObservableCollection<object> GroupNames {
@@ -54,7 +53,8 @@ namespace System.ComponentModel {
 
                protected virtual void OnPropertyChanged (PropertyChangedEventArgs e)
                {
-                       throw new NotImplementedException ();
+                       if (PropertyChanged != null)
+                               PropertyChanged (this, e);
                }
 
                [EditorBrowsable (EditorBrowsableState.Never)]