Here is the class:

public class UserBuilder
{
private MembershipUser user;
private tblUserInfo info;

public UserBuilder New(string userName, string password, string email)
{
user = Membership.CreateUser(userName, password, email);
info = new tblUserInfo() { DateCreated = DateTime.Now, DateModified = DateTime.Now, Active = true };
return this;
}

public UserBuilder WithFirstName(string firstName)
{
info.FirstName = firstName;
return this;
}

public UserBuilder WithLastName(string lastName)
{
info.LastName = lastName;
return this;
}

public UserBuilder WithInfo(UserInfoBuilder infoBuilder)
{
infoBuilder.New((Guid)user.ProviderUserKey, user.UserName);

return this;
}

public UserBuilder AssignRole(string roleName)
{
Roles.AddUserToRole(user.UserName, roleName);
return this;
}




public MembershipUser Build()
{
return user;
}


}

Usage:

[Test]
[RollBack]
public void should_be_able_to_assign_tutor_role_to_the_user()
{
var alice = new UserBuilder().New("alice", "alice1234$", "alice@yahoo.com")
.AssignRole("Tutor").Build();

var vAlice = Membership.GetUser(alice.UserName);

Assert.IsTrue(Roles.IsUserInRole(vAlice.UserName, "Tutor"));

}