Thank you so much for this tip.  I have been struggling with this exact situation for several days. 

 

 

**Edit**

This actually did not solve my problem.  Yes the page now posts back, but the change in the EditorWysiwygModeClass does not occur until the next post back.  This is because the Editor1_Initializing code occurs before the dropdown_selectedindexedChanged event.  So the Editor1_Initializing code is capturing the previously selected item, not the newly selected item.  So I am always one post back behind.