System.Data 2.0.0.0 System.Enum Identifiers may be either quoted or unquoted. Specifies how identifiers are treated by the data source when searching the system catalog. Field System.Data.Common.IdentifierCase The data source ignores identifier case when searching the system catalog. The identifiers "ab" and "AB" will match. 2.0.0.0 Field System.Data.Common.IdentifierCase The data source distinguishes identifier case when searching the system catalog. The identifiers "ab" and "AB" will not match. 2.0.0.0 Field System.Data.Common.IdentifierCase The data source has ambiguous rules regarding identifier case and cannot discern this information. 2.0.0.0