public virtual Nullable<bool> IsActive(
	Type parentEntityType,
	Guid parentEntityId,
	Nullable<Guid> userId,
	string email
)

Public Overridable Function IsActive ( 
	parentEntityType As Type,
	parentEntityId As Guid,
	userId As Nullable(Of Guid),
	email As String
) As Nullable(Of Boolean)

public:
virtual Nullable<bool> IsActive(
	Type^ parentEntityType, 
	Guid parentEntityId, 
	Nullable<Guid> userId, 
	String^ email
)

abstract IsActive : 
        parentEntityType : Type * 
        parentEntityId : Guid * 
        userId : Nullable<Guid> * 
        email : string -> Nullable<bool> 
override IsActive : 
        parentEntityType : Type * 
        parentEntityId : Guid * 
        userId : Nullable<Guid> * 
        email : string -> Nullable<bool>