private WkstStPlanContext GetContext(EnumContextFabricateBy fabricateBy, string parameter)
        {
            switch (fabricateBy)
            {
            case EnumContextFabricateBy.ConnectionString:
                return(new WkstStPlanContext(parameter));

            case EnumContextFabricateBy.ConfigFile:
                return(new WkstStPlanContext(GetConnectionStringFromSettings()));
            }
            return(null);
        }
 public MsSqlContextSingleton(EnumContextFabricateBy fabricateBy, string parameter = "")
 {
     _context = GetContext(fabricateBy, parameter);
 }