Gets the user name associated with the specified e-mail address.
Assembly: System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)
Takes, as input, an e-mail address and returns the first user name from the data source where the e-mail address matches the supplied email parameter value.
If no user name is found with a matching e-mail address, null is returned.
If multiple user names are found that match a particular e-mail address, only the first user name found should be returned. You can implement a custom mechanism for ensuring a unique e-mail address for each user name such as the RequiresUniqueEmail property supported by the SqlMembershipProvider provider.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.