Interview Questions Answers.ORG
Interviewer And Interviewee Guide
Interviews
Quizzes
Home
Quizzes
Interviews Dot Net Technologies Interviews:.Net Architecture.Net Database.Net Deployment.NET web servicesADO.NETADO.NET 2.0ASP ProgrammingASP.NetASP.NET 2.0ASP.NET CachingASP.Net MVCBizTalkC# (Sharp) Programming LanguageCOM+Crystal ReportsDataGrid (Grid view)Dot NetDot Net AssemblyDot Net Code SecurityDot NET crystal reportsDot Net FrameworkDot Net RemotingDot Net WindowsFormsEntity FrameworkMicrosoft .Net MobileMicrosoft BasicsMicrosoft.NETMicrosoft.NET 2.0Mixed MicrosoftMono FrameworkMOSSMSFMTSReporting ServicesSenior .Net DeveloperVB .NetVB .Net DeveloperVB.NET FrameworkWCF (Windows Communication Foundation)WCF Data ServicesWeb Forms
Copyright © 2018. All Rights Reserved
Dot Net Interview Question:
What is the difference between "using System.Data;" and directly adding the reference from "Add References Dialog Box"?
Submitted by: AdministratorWhen u compile a program using command line, u add the references using /r switch. When you compile a program using Visual Studio, it adds those references to our assembly, which are added using "Add Reference" dialog box. While "using" statement facilitates us to use classes without using their fully qualified names.
For example: if u have added a reference to "System.Data.SqlClient" using "Add Reference" dialog box then u can use SqlConnection class like this:
System.Data.SqlClient.SqlConnection
But if u add a "using System.Data.SqlClient" statement at the start of ur code then u can directly use SqlConnection class.
On the other hand if u add a reference using "using System.Data.SqlClient" statement, but don't add it using "Add Reference" dialog box, Visual Studio will give error message while we compile the program.
Submitted by: Administrator
For example: if u have added a reference to "System.Data.SqlClient" using "Add Reference" dialog box then u can use SqlConnection class like this:
System.Data.SqlClient.SqlConnection
But if u add a "using System.Data.SqlClient" statement at the start of ur code then u can directly use SqlConnection class.
On the other hand if u add a reference using "using System.Data.SqlClient" statement, but don't add it using "Add Reference" dialog box, Visual Studio will give error message while we compile the program.
Submitted by: Administrator
Copyright 2007-2024 by Interview Questions Answers .ORG All Rights Reserved.
https://InterviewQuestionsAnswers.ORG.
https://InterviewQuestionsAnswers.ORG.