public bool IsExistingPerson(
	IUserContext userContext,
	string emailAddress
)

Public Function IsExistingPerson ( 
	userContext As IUserContext,
	emailAddress As String
) As Boolean

public:
virtual bool IsExistingPerson(
	IUserContext^ userContext, 
	String^ emailAddress
) sealed

abstract IsExistingPerson : 
        userContext : IUserContext * 
        emailAddress : string -> bool 
override IsExistingPerson : 
        userContext : IUserContext * 
        emailAddress : string -> bool