MembershipProvider in .NET 4.0

问题:

How can I add the MembershipProvider class to my .NET 4.0 project in VS 2010 B2?

I want to customize a MembershipProvider, but I cannot without adding this class. Please guide me through this process.

回答1:

Interesting. However, build errors are your friend ;)

Attempting to build a class library built as you describe, I get the following build error:

The type name 'MembershipProvider' could not be found. This type has been forwarded to assembly 'System.Web.ApplicationServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Consider adding a reference to that assembly.

Following the instructions (adding a reference to System.Web.ApplicationServices) allows me to carry on as expected.

回答2:

The MembershipProvider abstract class is part of the System.Web.ApplicationServices namespace in the .net 4.0 Framework. Add a reference to that assembly and it should solve the issue.

回答3:

There is an reference not set oder an Missing using Namespace is System.Web.Security

for more info checkt out MSDN