Implement a Custom Membership User

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There is a article about Customer Membership Provider, However, I guess you want to your own user table other than using Microsoft ASPNET user table, so you will feel the previous article is not enough for your requirement. Yes, you must create your own custom Membership User class:

Please check here (How to: Implement a Custom Membership User)

Also, there is another one: Using login controls for an existing data source by creating a custom membership provider in ASP.NET 2.0