<MenuItem x:Name="menuView" Header="_View">
<MenuItem x:Name="menuHightlightRBC" Header="_Highlight healthy erytrocytes" IsCheckable="True" />
</MenuItem>
<MenuItem x:Name="menuView" Header="_View">
<MenuItem x:Name="menuHightlightRBC" Header="_Highlight healthy erytrocytes" IsCheckable="True" />
</MenuItem>