winforms - The statement if combobox selectedindex == 1 || 2 gives a syntax error in c# -


i'm making human animal year converter.

my code: 

if (combobox2.selectedindex == 1 || 2) {    combobox3.visible = true; }

i following error :

operator '||' cannot applied operands of type 'bool' , 'int'

you can't use above expression 

if (combobox2.selectedindex == 1 || 2) {    combobox3.visible = true; }

you have use in following way:

if (combobox2.selectedindex == 1 || combobox2.selectedindex == 2 ) {    combobox3.visible = true; }

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