I assume that you are talking about the CreateUserWizard control.
In the designer, right-click the CreateUserWizard control and select Customize User Creation Step. This will remove the email field string. I also recommend adding RegularExpressionValidator to check the email format for the username.
To copy a username to an email address, handle the CreateUser event and execute it:
protected void CreateUserWizard1_CreatingUser( object sender, LoginCancelEventArgs e ) { CreateUserWizard1.Email = CreateUserWizard1.UserName; }
Greg
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