asp.net – 无法为自定义MembershipProvider创建MembershipUser

无法从程序集“System.Web,Version = 4.0.0.0,Culture = neutral,PublicKeyToken = b03f5f7f11d50a3a”加载类型“MyTestApp.Membership.TestMembershipProvider”.

我正在从一个单元测试项目运行,所以我不知道是否导致了这个问题,但我确实包括System.Web,System.Web.ApplicationServices以及对MyApp.Membership和MyApp.DataModels(实体)的引用对象).

错误发生在我的“GetUser”功能下面,我的配置也在下面.

public override MembershipUser GetUser(object providerUserKey,bool userIsOnline)
{
    try
    {
        AccountEntities db = new AccountEntities();

        if ((providerUserKey is Guid) == false)
        {
            return null;
        }

        User user = (from u in db.Users
                     where u.UserId == (Guid)providerUserKey
                     && u.Application.LoweredApplicationName == this.ApplicationName.ToLower()
                     select u).FirstOrDefault();

        if (user != null)
        {   // ERROR: Starts here,user object is correct,data is all there.
            return new MembershipUser(this.ProviderName,user.UserName,(object)user.UserId,user.Email,user.PasswordQuestion,user.Comment,user.IsApproved,user.IsLockedOut,user.CreateDate,user.LastLoginDate,user.LastActivityDate,user.LastPasswordChangedDate,user.LastLockoutDate);
        }
        else
            return null;
    }
    catch (Exception ex)
    {
        this.WriteToEventLog(ex,"Unable to get user from object '{" + ((Guid)providerUserKey).ToString() + "}'.","Get User");
        return null;
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="AccountEntities" connectionString="metadata=res://*/Account.AccountDataModel.csdl|res://*/Account.AccountDataModel.ssdl|res://*/Account.AccountDataModel.msl;provider=System.Data.SqlClient;provider connection string='Data Source=&quotEDITED&quot;;Initial Catalog=CustomAuthentication;Persist Security Info=True;User ID=EDITED;Password=EDITED;MultipleActiveResultSets=True'" providerName="System.Data.EntityClient" />
  </connectionStrings>
  <system.web>
    <membership defaultProvider="TestMembershipProvider" userIsOnlineTimeWindow="15">
      <providers>
        <clear/>
        <add  name="TestMembershipProvider" type="MyTestApp.Membership.TestMembershipProvider"
              applicationName="/"
              description="Membership Test"
              enablePasswordReset="true"
              enablePasswordRetrieval="true"
              maxInvalidPasswordAttempts="3"
              minRequiredNonAlphanumericCharacters="8"
              minRequiredPasswordLength="8"
              passwordAttemptWindow="30"
              requiresQuestionAndAnswer="true"
              requiresUniqueEmail="true" />
      </providers>
    </membership>
  </system.web>
</configuration>