无效类型 meaning in Chinese

inefficient type

Alert the user to a type that is not valid
键入无效类型时向用户报警
The exception that is thrown for invalid casting or explicit conversion
因无效类型转换或显式转换引发的异常。
Is of an invalid type
属于无效类型。
Trustee is unknown - the trustee is an unknown type , but not necessarily an invalid type
Trustee _ is _ unknown该受信者是未知类型，但不一定是无效类型。