ComputeBuffer<char> Strange result about cloo HOT 4 CLOSED

            try
            {
                char[] pw_cracked = new char[5];
                var kernelCl = File.ReadAllText("kernel.cl");
                ComputePlatform platform = ComputePlatform.Platforms[0];
                ComputeContextPropertyList properties = new ComputeContextPropertyList(platform);
                ComputeContext context = new ComputeContext(platform.Devices, properties, null, IntPtr.Zero);
                ComputeBuffer<char> cracked_pw_mem_obj = new ComputeBuffer<char>(context, ComputeMemoryFlags.WriteOnly | ComputeMemoryFlags.CopyHostPointer, pw_cracked);

                ComputeProgram program = new ComputeProgram(context, kernelCl);
                program.Build(null, null, null, IntPtr.Zero);
                ComputeKernel kernel = program.CreateKernel("vector_add");
                kernel.SetMemoryArgument(0, cracked_pw_mem_obj);
                ComputeEventList eventList = new ComputeEventList();
                ComputeCommandQueue commands = new ComputeCommandQueue(context, context.Devices[0], ComputeCommandQueueFlags.None);
                commands.Execute(kernel, null, new long[] { GLOBAL_ITEM_SIZE }, new long[] { LOCAL_ITEM_SIZE }, eventList);
                commands.ReadFromBuffer(cracked_pw_mem_obj, ref pw_cracked, false, eventList);
                commands.Finish();
                Console.WriteLine("Cracked Password: " + String.Join("", pw_cracked));

                commands.Dispose();

                foreach (ComputeEventBase eventBase in eventList)
                {
                    eventBase.Dispose();
                }

                eventList.Clear();
                kernel.Dispose();
                program.Dispose();
                cracked_pw_mem_obj.Dispose();

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.ReadKey();

byte[] pw_cracked = new byte[maxlen + 1];
ComputeBuffer<byte> cracked_pw_mem_obj = new ComputeBuffer<byte>(context, ComputeMemoryFlags.WriteOnly | ComputeMemoryFlags.CopyHostPointer, pw_cracked);
Console.WriteLine("Cracked Password: " + String.Join("", pw_cracked.Select( p => Convert.ToChar(p))));