摘要:
isBooleantruefalseisif(o is Employee)...{Employee e=(Employee) o;}CLRisoEmployeeifCLRoEmployeeCLRCLRoCLR(Employee)Employee e=o as Employee;if(e!=null)...{}CLRoEmployee;asnulloEmployeeasnullasCLRifenull.asnullnullSystem.NullReferenceExceptionc# isas isas2istruefalsetruefalseisSystem.Boolean b1 = (o i 阅读全文
posted @ 2009-06-29 17:09
William Zhao
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