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Editorial Team
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Asked: 2026-06-03T14:52:02+00:00

For this overload : if CreateUser(username@email.com,pwd) , failed with error message :The e-mail address

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For this overload:

if CreateUser("username@email.com","pwd") , failed with error message :The e-mail address provided is invalid. Please check the value and try again.

but CreateUser("username@email.com","pwd","username@email.com") , succeed!

why?

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1 Answer

  1. Editorial Team

    It may be better to think of the methods like this:

    CreateUser(Username, Password);

CreateUser(Username, Password, Email);

    Without reflecting the code I couldn’t say 100% for sure, but I’ll bet those functions just call an internal function that takes in every possible parameter.

    So your first call (simplified) is actually:

    CreateUser("username@email.com", "pwd", null);

    If you have configured your provider to require email address, then clearly null is not valid.

    From the MSDN docs:

    The SqlMembershipProvider provides an option to require a unique
    e-mail address for each user. If the RequiresUniqueEmail property is
    true, you will need to use one of the CreateUser overloads that allows
    you to specify an e-mail address for the user being created.
    Otherwise, a MembershipCreateUserException will be thrown.

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