Flex actionscript datatable column names are encoded - how to decode?

Question

Hi,

I am returning a .NET datatable to Flex Actionscript via a web service. Once I have the datatable then I want to grab the column names. The following code outputs my column names:

for each (var tcolumn:Object in datatable.Columns){
   trace('Column:'+tcolumn);
}

This works ok, but the column names are somehow encoded, so a column name that is actually "1-9" is output as "_x005B_1-9_x005D_"

Anyone know the best way to decode the column name? The unescape function seems to make no difference. Thanks.