c# - Button that expands ComboBox causing infinite loop -

i have button on top of combobox, received element other developer , cannot change drastically. need happen when hover on button combobox open, when leave close. when click button trigger function. problem when hover on button combobox focus , stuck in infinite loop of open close (maybe there else wrong). not work.

<grid margin="10,0,10,0" grid.column="1">     <grid.columndefinitions>         <columndefinition width="85*"/>         <columndefinition width="15*"/>     </grid.columndefinitions>     <combobox height="30" name="combo2"               style="{staticresource categorycombobox}"               selectionchanged="combobox_selectionchanged2"               grid.columnspan="2"  grid.column="0">         <comboboxitem content="combobox item 1 (example)" />         <comboboxitem content="combobox item 2 (example)" />         <comboboxitem content="combobox item 3 (example)" />         <comboboxitem content="combobox item 4 (example)" />     </combobox>     <button mouseenter="mouseenter2" mouseleave="mouseleave2" name="menu_btn2"             click="gotomenu" style="{staticresource categorybutton}" grid.column="0"             content="category name 2" margin="20,0,0,0" fontsize="16"             fontfamily="pack://application:,,,/fonts/#univers lt std 57 cn" /> </grid> 

code:

private void mouseenter2(object sender, routedeventargs e) {     combo2.isdropdownopen = true; }  private void mouseleave2(object sender, routedeventargs e) {     combo2.isdropdownopen = false; } 

my first idea unsubscribe mouseenter2-event @ moment enter button. in mouseleave2-event have subscribe again mouseenter2. maybe works you

to unsubscribe mouseenter2-event have to:

button.mouseenter -= mouseenter2;