在C＃中使用命名空间

Question

I'm just starting out learning C# this may be really simple but in VB i have these namespaces

<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Globalization" %>
<%@ import Namespace="System.Data.SqlClient" %>

How do I go about using those namespaces in C#?

I tried

namespace System.Data

and

using System.Data

but they didn't work

Answer 1

Are you trying to import namespaces into an Asp.net page? If so the code you listed with a case change will work fine.

<%@ Import Namespace="System.Data"%>

If you're trying to import them into an actual .cs file then you need the "using" directive

using System.Data;
using System.Globalization;

Answer 2

using System.Data;

Answer 3

using System.Data;
using System.Globalization;
using System.Data.SqlClient;

public class MyClass {}

Answer 4

These:

<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Globalization" %>
<%@ import Namespace="System.Data.SqlClient" %>

are ASP.NET page directives. They'll be the same whether your code-behind files are C# or VB.