I have a library project that should be the base for several web applications. I am trying to implement System.Web.Security.MembershipProvider but for some reason Visual Studio cannot find it. It manages to find System.Web.Security.SqlMembershipProvider but not MembershipProvider.
我有一个库项目，应该是几个Web应用程序的基础。我正在尝试实现System.Web.Security.MembershipProvider但由于某种原因Visual Studio找不到它。它设法找到System.Web.Security.SqlMembershipProvider但不是MembershipProvider。
Any idea why?
知道为什么吗？
I am using Visual Studio 2010 with .NET 4.
我正在使用Visual Studio 2010和.NET 4。
1 个解决方案
#1
36
Starting in .NET 4, MembershipProvider is declared in System.Web.ApplicationServices.dll (strangely enough), so you need to add a reference to that assembly. In .NET 3.5 and earlier, MembershipProvider is declared in System.Web.dll.
从.NET 4开始，MembershipProvider在System.Web.ApplicationServices.dll中声明（奇怪的是），因此您需要添加对该程序集的引用。在.NET 3.5及更早版本中，MembershipProvider在System.Web.dll中声明。
Tip: To find out which assembly contains any .NET Framework class, just search for the class in MSDN Library. Here's what the MembershipProvider page for .NET 4 says:
提示：要找出哪个程序集包含任何.NET Framework类，只需在MSDN Library中搜索该类。以下是.NET 4的MembershipProvider页面所说的内容：
Namespace: System.Web.Security
Assembly: System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)命名空间：System.Web.Security程序集：System.Web.ApplicationServices（在System.Web.ApplicationServices.dll中）
And here's what the MembershipProvider page for .NET 3.5 says:
以下是.NET 3.5的MembershipProvider页面所说的内容：
Namespace: System.Web.Security
Assembly: System.Web (in System.Web.dll)命名空间：System.Web.Security程序集：System.Web（在System.Web.dll中）
#1
36
Starting in .NET 4, MembershipProvider is declared in System.Web.ApplicationServices.dll (strangely enough), so you need to add a reference to that assembly. In .NET 3.5 and earlier, MembershipProvider is declared in System.Web.dll.
从.NET 4开始，MembershipProvider在System.Web.ApplicationServices.dll中声明（奇怪的是），因此您需要添加对该程序集的引用。在.NET 3.5及更早版本中，MembershipProvider在System.Web.dll中声明。
Tip: To find out which assembly contains any .NET Framework class, just search for the class in MSDN Library. Here's what the MembershipProvider page for .NET 4 says:
提示：要找出哪个程序集包含任何.NET Framework类，只需在MSDN Library中搜索该类。以下是.NET 4的MembershipProvider页面所说的内容：
Namespace: System.Web.Security
Assembly: System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)命名空间：System.Web.Security程序集：System.Web.ApplicationServices（在System.Web.ApplicationServices.dll中）
And here's what the MembershipProvider page for .NET 3.5 says:
以下是.NET 3.5的MembershipProvider页面所说的内容：
Namespace: System.Web.Security
Assembly: System.Web (in System.Web.dll)命名空间：System.Web.Security程序集：System.Web（在System.Web.dll中）