/// <summary>
/// Delete a tool from member's boroowing tool collection
/// </summary>
/// <param name="aTool"> a Tool object</param>
public void deleteTool(Tool aTool)
{
numOfBorrowingTools--;
toolNames = resizeArray(toolNames);
borrowedTools.delete(aTool);
}
// logic implemented to delete a tool in the system
public void delete(Tool aTool)
{
Selected_Collection.delete(aTool);
}