String Invoke Issue

String Invoke Issue

I am using a backgroundworker and I think there is a cross thread thing..
But I cant solve it.
my code is here
private void bgworkerGameLoad_DoWork(object sender,
System.ComponentModel.DoWorkEventArgs e)
{
var arg = e.Argument.ToString();
var liste = webHelper.ShowGame("http://www.abx.com/" + arg);
txtHowToPlay.Invoke(new Action(() => txtHowToPlay.Text =
String.Format("Oyun Bilgi: {0}", liste[0])));
txtInfo.Invoke(new Action(() => txtInfo.Text =
String.Format("Nasýl Oynanýr: {0}", liste[1])));
bgworkerGameLoad.ReportProgress(0,liste[2]);
}
private void bgworkerGameLoad_RunWorkerCompleted(object sender,
System.ComponentModel.RunWorkerCompletedEventArgs e)
{
if (FlashPlayerActive)
UnLoad();
string url="";
Invoke(new MethodInvoker(() =>
{
url= e.UserState.ToString();
Thread.Sleep(2);
}));
axShockwaveFlash1.Movie = url;
LoadFlash();
pbWaitForChannelLoading.Visible = false;
axShockwaveFlash1.Play();
}
the problem is that I cant get the e.UserState.ToString() for my
shocwaveplayer. I used a local string variable but its the same result.
it is occured targetofaninvocation exception in program.cs
Application.Run(new FrmMain());;
but that code is in frmMain.cs
this is detail of the exception
System.Reflection.TargetInvocationException was unhandled
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib StackTrace: at
System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[]
arguments, SignatureStruct& sig, MethodAttributes methodAttributes,
RuntimeTypeHandle typeOwner) at
System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[]
arguments, Signature sig, MethodAttributes methodAttributes,
RuntimeTypeHandle typeOwner) at
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags
invokeAttr, Binder binder, Object[] parameters, CultureInfo culture,
Boolean skipVisibilityChecks) at
System.Delegate.DynamicInvokeImpl(Object[] args) at
System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry
tme) at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object
obj) at System.Threading.ExecutionContext.runTryCode(Object userData) at
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
code, CleanupCode backoutCode, Object userData) at
System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state) at
System.Threading.ExecutionContext.Run(ExecutionContext executionContext,
ContextCallback callback, Object state) at
System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry
tme) at System.Windows.Forms.Control.InvokeMarshaledCallbacks() at
System.Windows.Forms.Control.WndProc(Message& m) at
System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at
System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at
System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32
msg, IntPtr wparam, IntPtr lparam) at
System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at
System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData) at
System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32
reason, ApplicationContext context) at
System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32
reason, ApplicationContext context) at
System.Windows.Forms.Application.Run(Form mainForm) at XXX.Program.Main()
in c:\Users..............\Program.cs:line 23 at
System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) at
System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
assemblySecurity, String[] args) at
Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at
System.Threading.ThreadHelper.ThreadStart_Context(Object state) at
System.Threading.ExecutionContext.Run(ExecutionContext executionContext,
ContextCallback callback, Object state) at
System.Threading.ThreadHelper.ThreadStart() InnerException:
System.NullReferenceException Message=Object reference not set to an
instance of an object. Source=System.Windows.Forms StackTrace: at
System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate
method, Object[] args, Boolean synchronous) at
System.Windows.Forms.Control.Invoke(Delegate method, Object[] args) at
System.Windows.Forms.Control.Invoke(Delegate method) at
XXX.FrmMain.bgworkerGameLoad_RunWorkerCompleted(Object sender,
RunWorkerCompletedEventArgs e) in c:\Users..........\FrmMain.cs:line 332
at
System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs
e) at
System.ComponentModel.BackgroundWorker.AsyncOperationCompleted(Object arg)
InnerException:
what is my mistake? I tried to use delegate but its the same..