Try set IsEnabled
for MenuItem
to false:
Gets or sets a value indicating whether this element is enabled in the user interface.
Example:
<MenuItem Header="_Favorites">
<MenuItem Header="Empty"
IsEnabled="False" />
<MenuItem Header="AnotherItem"
IsEnabled="True" />
...
</MenuItem>
Also you can try set IsHitTestVisible
for MenuItem
to false:
Gets or sets a value that declares whether this element can possibly be returned as a hit test result from some portion of its rendered content.
Example:
<MenuItem Header="_Favorites">
<MenuItem Header="Empty"
IsHitTestVisible="False" />
...
</MenuItem>