>The best thing you could do would be to change the rowValues to use a KeyValuePair of string, object instead. Then the types wouldn't need to be converted. Of course that may not be possible depending on where that came from. Keep in mind you may need to use the Equals method to compare objects.
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>If it isn't possible to change the type of rowValues, you could get the type from the column from bookingRow.Table.Columns[kvp.Key]. Use the column's type to try to convert your kvp.Value using either Convert.ChangeType (http://msdn.microsoft.com/en-us/library/dtb69x08%28v=vs.100%29.aspx), or writing your own conversion method to parse, cast, or convert as appropriate.

Funny, but I'm back to the problem I found at first. My rowValue right now is " " and the passed value is "" and they compare as different, but I'd like to compare them as the same.