public class MyCalculationResults : CalculationResults
{     
    #region Classes for property names

    public new abstract class PropertyNames : CalculationResults.PropertyNames
    {
        //empty
    }

    #endregion // Classes for property names 

    #region Classes for result identifiers

    public new abstract class CalculationResultsIdentifiers : CalculationResults.CalculationResultsIdentifiers
    {
         public static readonly CalculationResultsIdentifier MySpecialColumn = CreateIdentifier("MySpecialColumn");

         public static readonly CalculationResultsIdentifier MyLumpedTogetherColumns = CreateIdentifier("MyLumpedTogetherColumns");

         public static readonly CalculationResultsIdentifier MyNewTable = CreateIdentifier("MyNewTable");
    }

    #endregion 

    #region Public properties

    public DataColumn MySpecialColumn
    {
        get { 
            ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MySpecialColumn);
            //check that the user hasn't removed the table or the column 
            if (res == null || res.Columns.Count == 0)
            {
                return null;
            }
            return res.Columns[0];
        }
    }

    public IEnumerable<DataColumn> MyLumpedTogetherColumns
    {
        get 
        {
            ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MyLumpedTogetherColumns);
            if (res == null)
            {
                return null;
            }
            return res.Columns;
        }
    }

    public DataTable MyNewTable
    {
        get
        {
             ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MyNewTable);
             if (res == null)
             {
                 return null;
             }
             //this will always work even if all the columns in the table are deleted. Thus it is preferable to asking a resultcolumn for 
             //its ancestor column 
             return res.DataTable;
        }
    }

    #endregion // Public properties 

    #region Construction

    public MyCalculationResults()
    {
    }

    #endregion // Construction        

    #region ISerializable Members

    protected MyCalculationResults(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {

    }

    protected override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        base.GetObjectData(info, context);
    }
    #endregion
 }

 public class MyCalculationResults : CalculationResults
{     
    #region Classes for property names

    public new abstract class PropertyNames : CalculationResults.PropertyNames
    {
        //empty
    }

    #endregion // Classes for property names 

    #region Classes for result identifiers

    public new abstract class CalculationResultsIdentifiers : CalculationResults.CalculationResultsIdentifiers
    {
         public static readonly CalculationResultsIdentifier MySpecialColumn = CreateIdentifier("MySpecialColumn");

         public static readonly CalculationResultsIdentifier MyLumpedTogetherColumns = CreateIdentifier("MyLumpedTogetherColumns");

         public static readonly CalculationResultsIdentifier MyNewTable = CreateIdentifier("MyNewTable");
    }

    #endregion 

    #region Public properties

    public DataColumn MySpecialColumn
    {
        get { 
            ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MySpecialColumn);
            //check that the user hasn't removed the table or the column 
            if (res == null || res.Columns.Count == 0)
            {
                return null;
            }
            return res.Columns[0];
        }
    }

    public IEnumerable<DataColumn> MyLumpedTogetherColumns
    {
        get 
        {
            ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MyLumpedTogetherColumns);
            if (res == null)
            {
                return null;
            }
            return res.Columns;
        }
    }

    public DataTable MyNewTable
    {
        get
        {
             ColumnsCalculationResult res = GetColumnsResult(CalculationResultsIdentifiers.MyNewTable);
             if (res == null)
             {
                 return null;
             }
             //this will always work even if all the columns in the table are deleted. Thus it is preferable to asking a resultcolumn for 
             //its ancestor column 
             return res.DataTable;
        }
    }

    #endregion // Public properties 

    #region Construction

    public MyCalculationResults()
    {
    }

    #endregion // Construction        

    #region ISerializable Members

    protected MyCalculationResults(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {

    }

    protected override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        base.GetObjectData(info, context);
    }
    #endregion
 }