how can i validate to see if the same selected item is selected out of five drop down lists

what would be the best or most effecient way of validating to see wheher or not the user selected the same item from five drop down lists.

I have five drop down lists that is poopulated with the same data and I want to check to see if that user selects the same item twice.

 I know I could us a bunch

if ddl1.selecteditem = ddl2.selecteditem Then

elseIf......and so fourth

But this doesnt seem like the ideal way of doing it. This way would also be alot of code. This would give me 20 If Then statments. Can someone suggest to me an easier or better way?

 
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