单项选择题
A. The TypeForwardedTo attribute should be used
B. The TypeConvertor.ConvertTo method should be used
C. The InternalsVisibleTo attribute should be used
D. The Type Convertor.ConvertFrom method should be used
单项选择题 YouworkasanapplicationdeveloperatCertkiller.com.YouarecurrentlyintheprocessofcreatingaclassthatstoresdataaboutCertkiller.com’scustomers.Certkiller.comcustomersareassigneduniqueidentifiersandvariouscharacteristicsthatmayincludealiases，shippinginstructions，andsalescomments.Thesecharacteristicscanchangeinbothsizeanddatatype.YoustartbydefiningtheCustomerclassasshownbelow：publicclassCustomer{privateintcustID；privateArrayListattributes；publicintCustomerID{get{returncustID；}}publicCustomer（intCustomerID）{this.custID=CustomerID；this.attributes=newArrayList（）；}publicvoidAddAttribute（objectatt）{attributes.Add（att）；}}YouhavetocreatetheFindAttributemethodforlocatingattributesinCustomerobjectsnomatterwhatthedatatypeis.YouneedtoensurethattheFindAttributemethodreturnstheattributeiffound，andyoualsoneedtoensuretype-safetywhenreturningtheattribute.Whatshouldyoudo？（）
单项选择题 YouworkastheapplicationdeveloperatCertkiller.com.Certkiller.comusesVisualStudio.NET2005asitsapplicationdevelopmentplatform.Youareintheprocessofstoringnumericalvaluesupto2，100，000，000intoavariableandmayrequirestoringnegativevaluesusinga.NETFramework2.0application.Youarerequiredtooptimizememoryusage.Whatshouldyoudo？（）