internal override CSDiagnosticInfo NotFound(Location location, string name, DiagnosticBag diagnostics) { return(diagnostics.Add( ReferenceEquals(qualifier, Compilation.GlobalNamespace) ? ErrorCode.ERR_GlobalSingleTypeNameNotFound : qualifier.IsNamespace?ErrorCode.ERR_DottedTypeNameNotFoundInNS: ErrorCode.ERR_DottedTypeNameNotFoundInAgg, location, name, qualifier.GetFullName())); }