BinarySearch() Not Locating Items In A Generic Collection?

May 14, 2010

When I dump the contents of a List<string>, I get:

John Barrowman

However, when I try to retrieve the index of the strings using this format...

thisIndex = blockRetrievedList.BinarySearch("Sue");

and print the indexes in an HTML list, here's the results that I get...

Using blockRetrievedList.BinarySearch('Larry'); : 1
Using blockRetrievedList.BinarySearch('Mike'); : -5
Using blockRetrievedList.BinarySearch('Sue'); : -5
Using blockRetrievedList.BinarySearch('Bob'); : -1
Using blockRetrievedList.BinarySearch('John Barrowman'); : -1

So while Larry comes out fine at index one, John Barrowman and Bob should be indexes 2 & 3 respectively. However, they're coming up -1 meaning they're not recognized as being the collection. Further Mike (who was originally in the set, but who has now been replaced by John Barrowman is coming up -5. Isn't that supposed to be -1? And why on Earth is Sue (who is index 0, returning -5 as well?

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