System.Threading.PreAllocatedOverlapped.Dispose C# (CSharp) Method

        public void Dispose()
        {
        }

    public unsafe void MultipleOperationsOverMultipleHandles()
    {
        const int DATA_SIZE = 2;

        SafeHandle handle1 = HandleFactory.CreateAsyncFileHandleForWrite(@"MultipleOperationsOverMultipleHandle1.tmp");
        SafeHandle handle2 = HandleFactory.CreateAsyncFileHandleForWrite(@"MultipleOperationsOverMultipleHandle2.tmp");
        ThreadPoolBoundHandle boundHandle1 = ThreadPoolBoundHandle.BindHandle(handle1);
        ThreadPoolBoundHandle boundHandle2 = ThreadPoolBoundHandle.BindHandle(handle2);

        OverlappedContext result1 = new OverlappedContext();
        OverlappedContext result2 = new OverlappedContext();

        byte[] data1 = new byte[DATA_SIZE];
        data1[0] = (byte)'A';
        data1[1] = (byte)'B';


        byte[] data2 = new byte[DATA_SIZE];
        data2[0] = (byte)'C';
        data2[1] = (byte)'D';

        PreAllocatedOverlapped preAlloc1 = new PreAllocatedOverlapped(OnOverlappedOperationCompleted, result1, data1);
        PreAllocatedOverlapped preAlloc2 = new PreAllocatedOverlapped(OnOverlappedOperationCompleted, result2, data2);

        for (int i = 0; i < 10; i++)
        {
            NativeOverlapped* overlapped1 = boundHandle1.AllocateNativeOverlapped(preAlloc1);
            NativeOverlapped* overlapped2 = boundHandle2.AllocateNativeOverlapped(preAlloc2);

            fixed (byte* p1 = data1, p2 = data2)
            {
                int retval = DllImport.WriteFile(boundHandle1.Handle, p1, DATA_SIZE, IntPtr.Zero, overlapped1);

                if (retval == 0)
                {
                    Assert.Equal(DllImport.ERROR_IO_PENDING, Marshal.GetLastWin32Error());
                }


                retval = DllImport.WriteFile(boundHandle2.Handle, p2, DATA_SIZE, IntPtr.Zero, overlapped2);

                if (retval == 0)
                {
                    Assert.Equal(DllImport.ERROR_IO_PENDING, Marshal.GetLastWin32Error());
                }

                // Wait for overlapped operations to complete
                WaitHandle.WaitAll(new WaitHandle[] { result1.Event, result2.Event });
            }

            boundHandle1.FreeNativeOverlapped(overlapped1);
            boundHandle2.FreeNativeOverlapped(overlapped2);

            result1.Event.Reset();
            result2.Event.Reset();

            Assert.Equal(0, result1.ErrorCode);
            Assert.Equal(0, result2.ErrorCode);
            Assert.Equal(DATA_SIZE, result1.BytesWritten);
            Assert.Equal(DATA_SIZE, result2.BytesWritten);
        }

        boundHandle1.Dispose();
        boundHandle2.Dispose();
        preAlloc1.Dispose();
        preAlloc2.Dispose();
        handle1.Dispose();
        handle2.Dispose();
    }