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Error using Binary Search of List

ThatThatGuy
449 Recognized Expert Contributor
How can i search for Rectangle object in a List<T> using BinarySearch() method of List<T>
.....

as i'm getting this error failed to compare two elements in a array...

the program works fine when the List is of Type String but fails when it's any thing other e.g Rectangle

any help is kindly appreciated
Dec 18 '09 #1
3 2660
tlhintoq
3,525 Recognized Expert Specialist
Have you read the MSDN on BinarySearch?
Dec 18 '09 #2
ThatThatGuy
449 Recognized Expert Contributor
i had done all sorts of research be it on web or the local msdn.....
all the examples use String and not any other kind of objects
Dec 18 '09 #3
tlhintoq
3,525 Recognized Expert Specialist
So then you read the MSDN on BinarySearch.
The error you are getting is explained at the top of the page.

Exceptions
Exception type Condition
InvalidOperatio nException
The default comparer Comparer.Defaul t cannot find an implementation of the IComparable generic interface or the IComparable interface for type T.

Remarks
This method uses the default comparer Comparer.Defaul t for type T to determine the order of list elements. The Comparer.Defaul t property checks whether type T implements the IComparable generic interface and uses that implementation, if available. If not, Comparer.Defaul t checks whether type T implements the IComparable interface. If type T does not implement either interface, Comparer.Defaul t throws an InvalidOperatio nException.
Dec 18 '09 #4

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