Думаю, вы можете запутаться с этим:
protected void CreateAccountButton_Click(object sender, EventArgs e)
{
MembershipCreateStatus createStatus;
MembershipUser newUser = Membership.CreateUser(Username.Text, Password.Text, Email.Text, passwordQuestion, SecurityAnswer.Text, true, out createStatus);
switch (createStatus)
{
case MembershipCreateStatus.Success:
CreateAccountResults.Text = "The user account was successfully created!";
break;
case MembershipCreateStatus.DuplicateUserName:
CreateAccountResults.Text = "There already exists a user with this username.";
break;
case MembershipCreateStatus.DuplicateEmail:
CreateAccountResults.Text = "There already exists a user with this email address.";
break;
case MembershipCreateStatus.InvalidEmail:
CreateAccountResults.Text = "There email address you provided in invalid.";
break;
case MembershipCreateStatus.InvalidAnswer:
CreateAccountResults.Text = "There security answer was invalid.";
break;
case MembershipCreateStatus.InvalidPassword:
CreateAccountResults.Text = "The password you provided is invalid. It must be seven characters long and have at least one non-alphanumeric character.";
break;
default:
CreateAccountResults.Text = "There was an unknown error; the user account was NOT created.";
break;
}
}