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Untyped DataTable
------------------
ColA ColB ColC
Typed DataTable
ColA ColB
TypedDataTable.Merge(UntypedDataTable)
Results in:
ColA ColB ColC
Is there anyway to keep it from adding the extra columns from untyped table?
In other words, I only want to keep ColA and ColB.
Mergehas an overload that lets you specify what to do with missing schema. One option is to ignore it, which should get the results you want. See the MSDN article here.