Finding non-matching datatable rows (multiple columns)

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this can happen when both datatable do have differences e.g. within Column.DataTypes
And/Or other not easy visually to detect differences

Use the immediate panel
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and type in

dt1.columns.Cast(Of DataColumn).Select(Function (x) String.Format("{0} - {1}{2}",x.ColumnName, x.DataType.toString, vbCrLF)).toArray

dt1 - repalce with your Variablename and check both schemas