can i change a filled dataset's column from type string to boolean?

hi,a field in my database is not boolean and i cant change it.
instead, it is filled with Y or N values.
now what i need to do is fill MyDataset from a dataadapter.
no problem
but now the MyBoolean field of  MyDataset is of type string
now i say
for i = 0 to MyDataset.MyTable.Count -1
if mydataset.mytable(i)(MyBoolean) = Y then
 mydataset.mytable(i)(MyBoolean) = True
else
 mydataset.mytable(i)(MyBoolean) = False
next i

can i change this type from string to boolean somehow?
jxhardingAsked:
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RonaldBiemansCommented:
Hi Jxharding,

Have you tried

        mydataset.mytable(i)(myboolean).DataType = GetType(System.Boolean)
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RonaldBiemansCommented:
Sorry forget my previous comment, You cannot change the datatype of a column once it contains data,
So the only thing you can is add an booelan extra column, and fill it with the data from myboolean
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