public DataTable MakeDataTable(){

    DataTable myTable;

    DataRow myNewRow;

    // Create a new DataTable.

    myTable = new DataTable("My Table");

    // Create DataColumn objects of data types.

    DataColumn colString = new DataColumn("StringCol");

    colString.DataType = System.Type.GetType("System.String");

    myTable.Columns.Add(colString); 

    DataColumn colInt32 = new DataColumn("Int32Col");

    colInt32.DataType = System.Type.GetType("System.Int32");

    myTable.Columns.Add(colInt32);

    DataColumn colBoolean = new DataColumn("BooleanCol");

    colBoolean.DataType = System.Type.GetType("System.Boolean");

    myTable.Columns.Add(colBoolean);

    DataColumn colTimeSpan = new DataColumn("TimeSpanCol");

    colTimeSpan.DataType = System.Type.GetType("System.TimeSpan");

    myTable.Columns.Add(colTimeSpan);

    DataColumn colDateTime = new DataColumn("DateTimeCol");

    colDateTime.DataType = System.Type.GetType("System.DateTime");

    myTable.Columns.Add(colDateTime);

    DataColumn colDecimal = new DataColumn("DecimalCol");

    colDecimal.DataType = System.Type.GetType("System.Decimal");

    myTable.Columns.Add(colDecimal);

    DataColumn colByteArray = new DataColumn("ByteArrayCol");

    colByteArray.DataType = System.Type.GetType("System.Byte[]");

    myTable.Columns.Add(colByteArray);

    // Populate one row with values.

    myNewRow = myTable.NewRow();

    myNewRow["StringCol"] = "Item Name";

    myNewRow["Int32Col"] = ;

    myNewRow["BooleanCol"] = true;

    myNewRow["TimeSpanCol"] = new TimeSpan(,,,,);

    myNewRow["DateTimeCol"] = System.DateTime.Today;

    myNewRow["DecimalCol"] = 64.0021;

    myNewRow["ByteArrayCol"] = new Byte[] { , ,  };

    myTable.Rows.Add(myNewRow);

    return myTable;

 }