/// <summary>
/// Singleton implementation
/// </summary>
/// <returns> a reference to a projection data access object </returns>
public static IProjectionDao GetInstance()
{
return(_instance ?? (_instance = new ProjectionDao()));
}
/// <summary>
///
/// </summary>
/// <param name="projectionDao"></param>
public ProjectionBase(IProjectionDao projectionDao)
{
_projectionDao = projectionDao;
}
