IDataPersistenceServiceTDataCount Method

[ObsoleteAttribute("Use Query(Expression).Count()", true)]
long Count(
	Expression<Func<TData, bool>> query,
	IPrincipal authContext = null
)

<ObsoleteAttribute("Use Query(Expression).Count()", true)>
Function Count ( 
	query As Expression(Of Func(Of TData, Boolean)),
	Optional authContext As IPrincipal = Nothing
) As Long

[ObsoleteAttribute(L"Use Query(Expression).Count()", true)]
long long Count(
	Expression<Func<TData, bool>^>^ query, 
	IPrincipal^ authContext = nullptr
)

[<ObsoleteAttribute("Use Query(Expression).Count()", true)>]
abstract Count : 
        query : Expression<Func<'TData, bool>> * 
        ?authContext : IPrincipal 
(* Defaults:
        let _authContext = defaultArg authContext null
*)
-> int64