Assign Roles to Users and Control Displayed Content Based on Role

Hi,<br>
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I am trying to implement roles in an ASP.NET Web Forms, using C# and SQL server.<br>
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I've seen various online tutorials, but they are for earlier versions of ASP.NET I think.<br>
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Can someone point me towards a recent tutorial, which I can use please?<br>
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My requirement is:<br>
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User types: Anonymous, Master_Admin, General_Admin.<br>
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Anonymous will have access to all pages, except Admin.aspx.<br>
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General_Admin &amp; Master_Admin will have access to Admin.aspx<br>
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On the Admin.aspx page, Master_Admin will be able to see all content. While General_Admin will have some content hidden from them.<br>
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Please can someone point me to a recent tutorial/post/ example which I can adapt to fit my problem?<br>
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Thanks in advance.