sending filestream on a remoting server throw SecurityException

I'm trying to upload a wave file thank's to FileStream, to a remoting server. Every time I try to use the function below, with my remoting interface:

public static void addAudioFile(FileStream source) { string fileName = source.Name.Split('\\').Last(); using (FileStream file = new FileStream(audioFolder + "\\" + fileName, FileMode.Create, System.IO.FileAccess.Write)) { byte[] bytes = new byte[source.Length]; source.Read(bytes, 0, (int)source.Length); file.Write(bytes, 0, bytes.Length); source.Close(); } } } 

I'm getting this error :

L'exception System.Security.SecurityException n'a pas été gérée HResult=-2146233078 Message=Le type System.Runtime.Remoting.ObjRef et les types qui en dérivent (tel que System.Runtime.Remoting.ObjRef) ne peuvent pas être désérialisés avec ce niveau de sécurité. Source=mscorlib StackTrace: Server stack trace: à System.Runtime.Serialization.FormatterServices.CheckTypeSecurity(Type t, TypeFilterLevel securityLevel) à System.Runtime.Serialization.Formatters.Binary.ObjectReader.CheckSecurity(ParseRecord pr) à System.Runtime.Serialization.Formatters.Binary.ObjectReader.ParseObject(ParseRecord pr) à System.Runtime.Serialization.Formatters.Binary.ObjectReader.Parse(ParseRecord pr) à System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWithMapTyped(BinaryObjectWithMapTyped record) à System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadObjectWithMapTyped(BinaryHeaderEnum binaryHeaderEnum) à System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() à System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) à System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) à System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.UnsafeDeserialize(Stream serializationStream, HeaderHandler handler) à System.Runtime.Remoting.Channels.CoreChannel.DeserializeBinaryRequestMessage(String objectUri, Stream inputStream, Boolean bStrictBinding, TypeFilterLevel securityLevel) à System.Runtime.Remoting.Channels.BinaryServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream) Exception rethrown at [0]: à System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) à System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) à ProjetZenAutomateClient.RemoteInterfaces.IRemoteZenAutomate.addAudioFile(FileStream source) à ProjetZenAutomateClient.iZenAutomate.addAudioFile(FileStream source) dans c:\TFVC-Geoffrey\Zen-Geoffreyg\Zen-Projets\GestionAutomate\Client\ProjetZenAutomateClient\iZenAutomate.cs:ligne 107 à ProjetZenAutomateWPF.ZenProjetEnvironnement.EventSelectionAddAudio(Object sender, RoutedEventArgs e) dans c:\TFVC-Geoffrey\Zen-Geoffreyg\Zen-Projets\GestionAutomate\Client\ProjetZenAutomateWPF\ZenProjetEnvironnement.cs:ligne 329 à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) à System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) à System.Windows.Controls.Primitives.ButtonBase.OnClick() à System.Windows.Controls.Button.OnClick() à Microsoft.Windows.Controls.Ribbon.RibbonButton.OnClick() à System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e) à System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e) à System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) à System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) à System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) à System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e) à System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) à System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) à System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) à System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) à System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) à System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) à System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) à System.Windows.Input.InputManager.ProcessStagingArea() à System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) à System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) à System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) à System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) à System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) à MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) à MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) à System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) à MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler) à System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) à MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) à MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) à System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) à System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) à System.Windows.Threading.Dispatcher.Run() à System.Windows.Application.RunDispatcher(Object ignore) à System.Windows.Application.RunInternal(Window window) à System.Windows.Application.Run(Window window) à System.Windows.Application.Run() à Zen.App.Main() dans c:\TFVC-Geoffrey\Zen-Geoffreyg\Zen-Common\Zen\obj\Debug\App.g.cs:ligne 0 à System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) à System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) à Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() à System.Threading.ThreadHelper.ThreadStart_Context(Object state) à System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) à System.Threading.ThreadHelper.ThreadStart() InnerException: 

I'm able to retrieve a file with filestream, but not to upload any file.

My client side call:

Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog(); dlg.DefaultExt = ".wav"; dlg.Filter = "WAVE Files (*.wav)|*.wav"; Nullable<bool> result; result = dlg.ShowDialog(); if (result == true) { FileStream fs = File.Open(dlg.FileName, FileMode.Open); iAuto.addAudioFile(fs); } 

iAuto.addAudioFile(fs) being the call of my interface method