You just need to tweak your code just a little bit. You need to iterate through the Columns collection inside the DataTable. Try this:

DataTable DT = MyDataSet.Tables[0];
foreach(DataColumn DC in DT.Columns)
{
  ColumnName[Col] = DC.ColumnName;
  MaxLength[Col] =  DC.MaxLength;
  Nullable[Col] = DC.AllowDBNull;
}

>All,
>
>I was looking to parse through all of the Columns of a DataTable to see if the Column accepted nulls:
>

>DataTable DT = MyDataSet.Tables[0];
>foreach(DataColumn DC in DT)
>{
>  ColumnName[Col] = DC.ColumnName;
>  MaxLength[Col] =  DC.MaxLength;
>  Nullable[Col] = DC.AllowDBNull;
>}
>

>But I get an
>

>foreach statement cannot operate on variables of type 'System.Data.DataTable' because System.Data.DataTable' does not contain a definition for 'GetEnumerator', or it is inaccessible
>

>Any workaround? How do I implement GetEnumerator on a DataTable?
>
>TIA,
>Doug